9=3x+7(x+7)

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



9=3x+7(x+7)

We move all terms to the left:

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



We calculate terms in parentheses: -(3x+7(x+7)), so:

3x+7(x+7)

We multiply parentheses

3x+7x+49

We add all the numbers together, and all the variables

10x+49

Back to the equation:

-(10x+49)



We get rid of parentheses

-10x-49+9=0

We add all the numbers together, and all the variables

-10x-40=0

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

-10x=40

x=40/-10

x=-4

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