Answer
z=-$\frac{7}{2}$
Work Step by Step
Divide both sides of the equation by 8 to isolate the variable.
-28=8z
8z=-28
$\frac{8z}{8}$=-$\frac{28}{8}$
z=-$\frac{28}{8}=-\frac{28\div4}{8\div4}$
z=-$\frac{7}{2}$
Check the answer.
8(-$\frac{7}{2}$)=-28
-$\frac{8(7)}{2}$=-28
-$\frac{56}{2}$=-28
-28=-28