Solve 1140*m - 1996*m - 61542 = -1645*m for m.
Solve this plz.

A: 78

Solve -1850*r + 1900 = -2325*r for r.
Solve this plz.

A: -4

Solve 989 = -249*l - 2248 for l.
Solve this plz.

A:
-13