Question

-2z-xy=x+7 for x show work please

Answer 1

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)
$\frac{-2z-7}{1+y}=x$
$x=\frac{-2z-7}{y+1}$