7z+2z=8z-9

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Solution for 7z+2z=8z-9 equation: 



7z+2z=8z-9

We move all terms to the left:

7z+2z-(8z-9)=0

We add all the numbers together, and all the variables

9z-(8z-9)=0

We get rid of parentheses

9z-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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