-9z=8-7z

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Solution for -9z=8-7z equation: 



-9z=8-7z

We move all terms to the left:

-9z-(8-7z)=0

We add all the numbers together, and all the variables

-9z-(-7z+8)=0

We get rid of parentheses

-9z+7z-8=0

We add all the numbers together, and all the variables

-2z-8=0

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

-2z=8

z=8/-2

z=-4

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