Question

Решите уравнение: -4*(-z+7)=Z+17

Answer 1

-4z - 28 = z + 17
-4z - z = 17 + 28
-5z=45 
z = - 9

Answer 2

4z-28=z+17
4z-z=17+28
3z=45
z=45:3
z=15