3z-9+12=

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Solution for 3z-9+12= equation: 


Simplifying
3z + -9 + 12 = 0

Reorder the terms:
-9 + 12 + 3z = 0

Combine like terms: -9 + 12 = 3
3 + 3z = 0

Solving
3 + 3z = 0

Solving for variable 'z'.

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

Add '-3' to each side of the equation.
3 + -3 + 3z = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 3z = 0 + -3
3z = 0 + -3

Combine like terms: 0 + -3 = -3
3z = -3

Divide each side by '3'.
z = -1

Simplifying
z = -1

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