If x+y=4, x-y=36, for integers of x and y, x=?	Answers:  A) 20  B) 15  C) 25  D) 13  E) 42
x+y = 4   x-y = 36   2x = 40   x = 20   20nswer is 20
<result>A</result>
If x+y=4, x-y=36, for integers of x and y, x=?