y = 2x -7x + 2y = 1
easyy=2x-7sub 2x-7 for every y you se inother equationx+2(2x-7)=1x+4x-14=15x-14=1add 14 both sides5x=15divide 5x=3sub backy=2x-7y=2(3)-7y=6-7y=-1(3,-1) is solution