Answer:
3x-4y=-22
10x+8y=12
(3x-4y=-22) x 2--------->. 6x-8y=-44
10x+8y+6x-8y=12-44
16x=-32
x=-2
3(-2)-4y=-22
-6-4y=-22
-4y=-16
y=4
(ps: I don't know what you actually want, so I sloved both x and y.)
x= - 2,
y= 4