Solve Two Algebra Problems with Math Chat

Problems

if 7x-4y=-1 and 5x+3y=52, then x-y=...

(A) -4
(B) -3
(C) 3
(D) 4
(E) 5

Solution

Problem Source

http://www.newgre.org/example-problems/gre-math-algebra-problems-solutions/