Document:

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                                                                 EXHIBIT (10)(x)

                     AMENDMENT TO ASSET MANAGEMENT AGREEMENT

         This Amendment to Asset Management Agreement dated as of May 31, 2000
(this "Amendment") is entered into by and between Radiant Partners, LLC, a New
York limited liability company (the "Manager") and First Union Real Estate
Equity and Mortgage Investments (the "Company").

                                    RECITALS

         1.       The Manager and the Company executed an Asset Management
                  Agreement, dated as of March 27, 2000 (the "Agreement");

         2.       The parties hereto have determined to enter into this
                  Amendment for purposes of amending the Agreement.

         NOW, THEREFORE, in consideration of the premises and mutual covenants
and agreements set forth herein, and for other consideration the adequacy of
which is hereby acknowledged, the parties hereby agree as follows:

         A.       Clause (v) of Article III(a) is deleted in its entirety and
                  replaced by the following clause (v) of Article III(a):

                  (v)      at the election of either party, any time prior to
                           July 31, 2000, upon thirty (30) days prior written
                           notice to the other party.

         B.       The Agreement, as amended by this Amendment, constitutes the
                  entire agreement between the parties with respect to the
                  subject matter hereof.

         C.       Unless otherwise provided herein, capitalized terms herein
                  shall have the meanings ascribed to them in the Agreement.

         D.       Except as otherwise provided in this Amendment to the
                  contrary, the terms and conditions of the Agreement as amended
                  by this Amendment shall remain in full force and effect.

         E.       In any case in which the terms of this Amendment are
                  inconsistent with the terms of the Agreement, the terms of
                  this Amendment shall govern.

                                      -1-
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         IN WITNESS WHEREOF, the undersigned have executed this Amendment as of
the date first above written.

                                 FIRST UNION REAL ESTATE EQUITY
                                 and MORTGAGE INVESTMENTS

                                 By: /s/ William A. Ackman
                                     ------------------------------------
                                     William A. Ackman, Chairman

                                 RADIANT PARTNERS, LLC

                                 By: /s/ Daniel P. Friedman
                                     ------------------------------------
                                     Daniel P. Friedman, Managing Member

                                      -2-<PAGE>   1
                                                                 EXHIBIT (10)(y)

                 SECOND AMENDMENT TO ASSET MANAGEMENT AGREEMENT

         This Second Amendment to Asset Management Agreement, dated as of June
16, 2000 (this "Second Amendment"), is entered into by and between Radiant
Partners, LLC, a New York limited liability company (the "Manager"), and First
Union Real Estate Equity and Mortgage Investments (the "Company").

                                    RECITALS

         1.       The Manager and the Company executed an Asset Management
                  Agreement, dated as of March 27, 2000;

         2.       The Manager and the Company executed an Amendment (the "First
                  Amendment") to the Asset Management Agreement, dated as of May
                  31, 2000 (as amended, the "Agreement");

         3.       The parties hereto have determined to enter into this Second
                  Amendment for purposes of further amending the Agreement.

         NOW, THEREFORE, in consideration of the premises and mutual covenants
and agreements set forth herein, and for other consideration the adequacy of
which is hereby acknowledged, the parties hereby agree as follows:

         A.       Clause (v) of Article III(a) of the Agreement is deleted in
                  its entirety and replaced by the following clause (v) of
                  Article III(a):

                  (v)      at the election of either party, any time prior to
                           October 1, 2000, upon thirty (30) days prior written
                           notice to the other party.

         B.       The Agreement, as amended by this Second Amendment,
                  constitutes the entire agreement between the parties with
                  respect to the subject matter hereof.

         C.       Unless otherwise provided herein, capitalized terms herein
                  shall have the meanings ascribed to them in the Agreement.
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         D.       Except as otherwise provided in this Second Amendment to the
                  contrary, the terms and conditions of the Agreement as amended
                  by this Second Amendment shall remain in full force and
                  effect.

         E.       In any case in which the terms of this Second Amendment are
                  inconsistent with the terms of the Agreement, the terms of
                  this Second Amendment shall govern.

         IN WITNESS WHEREOF, the undersigned have executed this Amendment as of
the date first above written.

                                 FIRST UNION REAL ESTATE EQUITY
                                 and MORTGAGE INVESTMENTS

                                 By: /s/ William A. Ackman
                                     ------------------------------------
                                     William A. Ackman, Chairman

                                 RADIANT PARTNERS, LLC

                                 By: /s/ Daniel P. Friedman
                                     ------------------------------------
                                     Daniel P. Friedman, Managing Member

358298

                                      -2-<PAGE>   1
                                                                 EXHIBIT (10)(z)

                  THIRD AMENDMENT TO ASSET MANAGEMENT AGREEMENT

         This Third Amendment to Asset Management Agreement, dated as of August
17, 2000 (this "Third Amendment"), is entered into by and between Radiant
Partners, LLC, a New York limited liability company (the "Manager"), and First
Union Real Estate Equity and Mortgage Investments (the "Company").

                                    RECITALS

         1.       The Manager and the Company executed an Asset Management
                  Agreement, dated as of March 27, 2000;

         2.       The Manager and the Company executed a first amendment (the
                  "First Amendment") to the Asset Management Agreement, dated as
                  of May 31, 2000 and a second amendment (the "Second
                  Amendment") to the Asset Management Agreement, dated as of
                  June 16, 2000 (as amended, the "Agreement");

         3.       The parties hereto have determined to enter into this Third
                  Amendment for purposes of further amending the Agreement.

         NOW, THEREFORE, in consideration of the premises and mutual covenants
and agreements set forth herein, and for other consideration the adequacy of
which is hereby acknowledged, the parties hereby agree as follows:

         A.       Clause (v) of Article III(a) of the Agreement is deleted in
                  its entirety and replaced by the following clause (v) of
                  Article III(a):

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                  (v)      at the election of either party, any time prior to
                           December 1, 2000, upon thirty (30) days prior written
                           notice to the other party.

         B.       The Agreement, as amended by this Third Amendment, constitutes
                  the entire agreement between the parties with respect to the
                  subject matter hereof.

         C.       Unless otherwise provided herein, capitalized terms herein
                  shall have the meanings ascribed to them in the Agreement.

         D.       Except as otherwise provided in this Third Amendment to the
                  contrary, the terms and conditions of the Agreement as amended
                  by this Third Amendment shall remain in full force and effect.

         E.       In any case in which the terms of this Third Amendment are
                  inconsistent with the terms of the Agreement, the terms of
                  this Third Amendment shall govern.

                                      -2-
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         IN WITNESS WHEREOF, the undersigned have executed this Third Amendment
as of the date first above written.

                                 FIRST UNION REAL ESTATE EQUITY
                                 and MORTGAGE INVESTMENTS

                                 By: /s/ William A. Ackman
                                     ------------------------------------
                                     William A. Ackman, Chairman

                                 RADIANT PARTNERS, LLC

                                 By: /s/ Daniel P. Friedman
                                     ------------------------------------
                                     Daniel P. Friedman, Managing Member

                                      -3-<PAGE>   1
                                                                EXHIBIT (10)(aa)

                 FOURTH AMENDMENT TO ASSET MANAGEMENT AGREEMENT

         This Fourth Amendment to Asset Management Agreement, dated as of
September 15, 2000 (this "Fourth Amendment"), is entered into by and between
Radiant Partners, LLC, a New York limited liability company (the "Manager"), and
First Union Real Estate Equity and Mortgage Investments (the "Company").

                                    RECITALS

         1.       The Manager and the Company executed an Asset Management
                  Agreement, dated as of March 27, 2000;

         2.       The Manager and the Company executed a first amendment (the
                  "First Amendment") to the Asset Management Agreement, dated as
                  of May 31, 2000, a second amendment (the "Second Amendment")
                  to the Asset Management Agreement, dated as of June 16, 2000
                  and a third amendment (the "Third Amendment") to the Asset
                  Management Agreement, dated as of August 17, 2000 (as amended,
                  the "Agreement");

         3.       The parties hereto have determined to enter into this Fourth
                  Amendment for purposes of further amending the Agreement.

         NOW, THEREFORE, in consideration of the premises and mutual covenants
and agreements set forth herein, and for other consideration the adequacy of
which is hereby acknowledged, the parties hereby agree as follows:

         A.       The following provisions are added as clause 1.2(b) of Article
                  I of the Agreement:

<PAGE>   2
                  "(b) Manager shall cooperate with the Trust in connection with
         and use its reasonable best efforts to (i) prepare and file and clear
         with the Securities and Exchange Commission the proxy statement and any
         amendments or supplements thereto required to obtain the approval of
         the shareholders of the Trust to the sale contemplated by the Contracts
         of Sale between the Trust, Radiant Investors LLC, and the other parties
         signatory thereto and the Trust and Radiant Investors LLC dated
         September 15, 2000 and September 15, 2000 (the "Contracts of Sale") and
         any amendments to the organizational or governing documents of the
         Trust necessary to consummate the sales contemplated by the Contracts
         of Sale as promptly as practicable and, in any event, before the date
         that would allow sufficient time to declare a record date, mail proxy
         statements, solicit proxies and conduct a meeting of the Trust's
         shareholders in accordance with all applicable laws, rules and
         regulations and the Trust's organizational and governing documents by
         no later than the applicable Shareholder Approval Deadline (as defined
         in the Contracts of Sale), and (ii) duly call, give notice of, convene
         and hold such meeting on or before the applicable Shareholder Approval
         Deadline (as defined in the Contracts of Sale)."

         B.       Unless otherwise provided herein, capitalized terms herein
                  shall have the meanings ascribed to them in the Agreement.

         C.       Except as otherwise provided in this Fourth Amendment to the
                  contrary, the terms and conditions of the Agreement as amended
                  by this Fourth Amendment shall remain in full force and
                  effect.

         D.       In any case in which the terms of this Fourth Amendment are
                  inconsistent with the terms of the Agreement, the terms of
                  this Fourth Amendment shall govern.

                                      -2-
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         IN WITNESS WHEREOF, the undersigned have executed this Fourth Amendment
as of the date first above written.

                                 FIRST UNION REAL ESTATE EQUITY
                                 and MORTGAGE INVESTMENTS

                                 By: /s/ William A. Ackman
                                     ------------------------------------
                                     William A. Ackman, Chairman

                                 RADIANT PARTNERS, LLC

                                 By: /s/ Daniel P. Friedman
                                     ------------------------------------
                                     Daniel P. Friedman, Managing Member

                                      -3-

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