12z-3z=9

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Solution for 12z-3z=9 equation: 


Simplifying
12z + -3z = 9

Combine like terms: 12z + -3z = 9z
9z = 9

Solving
9z = 9

Solving for variable 'z'.

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

Divide each side by '9'.
z = 1

Simplifying
z = 1

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