-3(-7+z)=

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


Simplifying
-3(-7 + z) = 0
(-7 * -3 + z * -3) = 0
(21 + -3z) = 0

Solving
21 + -3z = 0

Solving for variable 'z'.

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

Add '-21' to each side of the equation.
21 + -21 + -3z = 0 + -21

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

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

Divide each side by '-3'.
z = 7

Simplifying
z = 7

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