9+z=-12

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Solution for 9+z=-12 equation: 


Simplifying
9 + z = -12

Solving
9 + z = -12

Solving for variable 'z'.

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

Add '-9' to each side of the equation.
9 + -9 + z = -12 + -9

Combine like terms: 9 + -9 = 0
0 + z = -12 + -9
z = -12 + -9

Combine like terms: -12 + -9 = -21
z = -21

Simplifying
z = -21

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