x/4 - y/2 = -11/4

x/4 + y/2 = 1/4

solve the system

multiply first by 4 ---> x - 2y = -11

multiply 2nd by 4 ---> x + 2y = 1

add them: 2x = -10
x = -5
plug into x+2y=1
-5 + 2y = 1
2y = 6
y = 3 --------> x = -5, y = 3