(9z-7)+(7z+7)=90

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Solution for (9z-7)+(7z+7)=90 equation: 



(9z-7)+(7z+7)=90

We move all terms to the left:

(9z-7)+(7z+7)-(90)=0

We get rid of parentheses

9z+7z-7+7-90=0

We add all the numbers together, and all the variables

16z-90=0

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

16z=90

z=90/16

z=5+5/8

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