3z=84+15z

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Solution for 3z=84+15z equation: 



3z=84+15z

We move all terms to the left:

3z-(84+15z)=0

We add all the numbers together, and all the variables

3z-(15z+84)=0

We get rid of parentheses

3z-15z-84=0

We add all the numbers together, and all the variables

-12z-84=0

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

-12z=84

z=84/-12

z=-7

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