9z-12=87

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Solution for 9z-12=87 equation: 


Simplifying
9z + -12 = 87

Reorder the terms:
-12 + 9z = 87

Solving
-12 + 9z = 87

Solving for variable 'z'.

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

Add '12' to each side of the equation.
-12 + 12 + 9z = 87 + 12

Combine like terms: -12 + 12 = 0
0 + 9z = 87 + 12
9z = 87 + 12

Combine like terms: 87 + 12 = 99
9z = 99

Divide each side by '9'.
z = 11

Simplifying
z = 11

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