12-3z=18

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Solution for 12-3z=18 equation: 



12-3z=18

We move all terms to the left:

12-3z-(18)=0

We add all the numbers together, and all the variables

-3z-6=0

We move all terms containing z to the left, all other terms to the right

-3z=6

z=6/-3

z=-2

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