3x-9=(7x+7)

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



3x-9=(7x+7)

We move all terms to the left:

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



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

(7x+7)

We get rid of parentheses

7x+7

Back to the equation:

-(7x+7)



We get rid of parentheses

3x-7x-7-9=0

We add all the numbers together, and all the variables

-4x-16=0

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

-4x=16

x=16/-4

x=-4

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