The sum of two number is 120 and their difference is 30. Find the numbers.  Pick
A) 9525  B) 5565  C) 7545  D) 6555  E) 8535

Rationale: let the two number be x and y . x + y = 120 . . . . . . . ( 1 ) x - y = 30 . . . . . . . . . ( 2 ) = > 2 x = 150 = > x = 75 . x - y = 30 = > y = 45 . the two numbers are 7545 ans : c
Answer: C