X+7+(7x-13)=90

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Solution for X+7+(7x-13)=90 equation: 



X+7+(7X-13)=90

We move all terms to the left:

X+7+(7X-13)-(90)=0

We add all the numbers together, and all the variables

X+(7X-13)-83=0

We get rid of parentheses

X+7X-13-83=0

We add all the numbers together, and all the variables

8X-96=0

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

8X=96

X=96/8

X=12

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