2x + y = 43x - y = 6
y=(1/2)x-1
You have to set both to y and then add. After that you solve for y
so, just add2x+y=43x-y=6 +5x+0y=105x=10divide 5x=2sub back2x+y=42(2)+y=44+y=4y=0x=2y=0(2,0)the result of adding the equation is 5x=10