12z-18=21

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Solution for 12z-18=21 equation: 



12z-18=21

We move all terms to the left:

12z-18-(21)=0

We add all the numbers together, and all the variables

12z-39=0

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

12z=39

z=39/12

z=3+1/4

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