-3(z+7)=-21

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Solution for -3(z+7)=-21 equation: 


Simplifying
-3(z + 7) = -21

Reorder the terms:
-3(7 + z) = -21
(7 * -3 + z * -3) = -21
(-21 + -3z) = -21

Add '21' to each side of the equation.
-21 + 21 + -3z = -21 + 21

Combine like terms: -21 + 21 = 0
0 + -3z = -21 + 21
-3z = -21 + 21

Combine like terms: -21 + 21 = 0
-3z = 0

Solving
-3z = 0

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Divide each side by '-3'.
z = 0

Simplifying
z = 0

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