z-21=-6

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Solution for z-21=-6 equation: 


Simplifying
z + -21 = -6

Reorder the terms:
-21 + z = -6

Solving
-21 + z = -6

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 + z = -6 + 21

Combine like terms: -21 + 21 = 0
0 + z = -6 + 21
z = -6 + 21

Combine like terms: -6 + 21 = 15
z = 15

Simplifying
z = 15

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