If x+y=20, x-y=36, for integers of x and y, x=?  Pick one:	A) 20	B) 25	C) 28	D) 20	E) 42
x+y = 20   x-y = 36   2x =56   x = 28   Answer is 28
<result>C</result>
If x+y=20, x-y=36, for integers of x and y, x=?