-9z-1=-7z-7-8z

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Solution for -9z-1=-7z-7-8z equation: 



-9z-1=-7z-7-8z

We move all terms to the left:

-9z-1-(-7z-7-8z)=0

We add all the numbers together, and all the variables

-9z-(-15z-7)-1=0

We get rid of parentheses

-9z+15z+7-1=0

We add all the numbers together, and all the variables

6z+6=0

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

6z=-6

z=-6/6

z=-1

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