x=2y+7 (2y+7)^2-y^2=24 4y^2+28y+49-y^2-24=0 3y^2+28y+25=0 D=784-300=484=22^2 y1=(28+22)/6=25/3=8 1/3 y2=(28-22)/6=1 x1=23 2/3 x2=9