-9-7z=-8z

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



-9-7z=-8z

We move all terms to the left:

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

We get rid of parentheses

-7z+8z-9=0

We add all the numbers together, and all the variables

z-9=0

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

z=9

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