remember we can do anything to an equation as long as you do it to both sides
add xy to both sides -2z=x+xy+7 minus 7 both sides -2z-7=x+xy undistribute x -2z-7=x(1+y) divide both sides by (1+y) [tex]\frac{-2z-7}{1+y}=x[/tex] [tex]x=\frac{-2z-7}{y+1}[/tex]
