Solve the equation
70 = -7(-2 - 2z)
z = 4
z = -28
z = -112
z = 784

70 = -7 (-2 - 2z)

First, divide both sides by -7. / Your problem should look like:  = -2 - 2z
Second, simplify  to  / Your problem should look like:  = -2 - 2z
Third, simplify  to get 10. / Your problem should look like: -10 = -2 - 2z
Fourth, add 2 to both sides. / Your problem should look like: -10 + 2 = -2z
Fifth, simplify -10 + 2 to get -8. / Your problem should look like: -8 = -2z
Sixth, divide both sides by -2. / Your problem should look like:  = z
Seventh, simplify  to  / Your problem should look like:  = z
Eighth, simplify  to get 4. / Your problem should look like: 4 = z
Ninth, switch your problem around. / Your problem should look like: z = 4

 z = 4 

70=−7(−2−2z)

Simplify:

70=−7(−2−2z)

70=(−7)(−2)+(−7)(−2z)(Distribute)

70=14+14z

Flip the equation.

14z+14=70

Subtract 14 from both sides.

14z+14−14=70−14

14z=56

Divide both sides by 14.

14z/14=56/14

z=4