-8z-7=-9z

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



-8z-7=-9z

We move all terms to the left:

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

We get rid of parentheses

-8z+9z-7=0

We add all the numbers together, and all the variables

z-7=0

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

z=7

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