5-(-z)=21

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Solution for 5-(-z)=21 equation: 


Simplifying
5 + -1(-1z) = 21

Remove parenthesis around (-1z)
5 + -1 * -1z = 21

Multiply -1 * -1
5 + 1z = 21

Solving
5 + 1z = 21

Solving for variable 'z'.

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

Add '-5' to each side of the equation.
5 + -5 + 1z = 21 + -5

Combine like terms: 5 + -5 = 0
0 + 1z = 21 + -5
1z = 21 + -5

Combine like terms: 21 + -5 = 16
1z = 16

Divide each side by '1'.
z = 16

Simplifying
z = 16

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