12z-15=21

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Solution for 12z-15=21 equation: 



12z-15=21

We move all terms to the left:

12z-15-(21)=0

We add all the numbers together, and all the variables

12z-36=0

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

12z=36

z=36/12

z=3

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