(3x-9)=(x+7)=90

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Solution for (3x-9)=(x+7)=90 equation: 



(3x-9)=(x+7)=90

We move all terms to the left:

(3x-9)-((x+7))=0

We get rid of parentheses

3x-((x+7))-9=0



We calculate terms in parentheses: -((x+7)), so:

(x+7)

We get rid of parentheses

x+7

Back to the equation:

-(x+7)



We get rid of parentheses

3x-x-7-9=0

We add all the numbers together, and all the variables

2x-16=0

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

2x=16

x=16/2

x=8

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