Just subisute values that will work one easy way is to make one sides equal to only one of the placeholders, like y, and then lug in values in for x exg x+2y=3 subtract x from both sides 2y=3-x divideb bith sides by 2 y=-1/2x+3 subsitute valudes for x and get values for y if x=2 then y=-1/2(2)+3 y==-1+3 y=2 when x=2, y=2 when y=0 then y=3
