8x + 3y = 20.50 - 4x+5y=22.50 = 4x-2y=-2, so you have to divide each number by 2, then 2x-y=-1, so
-y=-1-2x /-1, y=1+2x, then replace it with one original equation like the first one for instance: 8x+3(1+2x)=20.50, then 8x+3+6x=20.50, then 14x=20.50-3 14x=17.5 x=1.25, then solve y:\ y=1+2*(1.25) y=1+2.5 y=3.5, So answer is x=1.25, and y=3.5
