9-x=7(x+7)

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



9-x=7(x+7)

We move all terms to the left:

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

We add all the numbers together, and all the variables

-1x-(7(x+7))+9=0



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

7(x+7)

We multiply parentheses

7x+49

Back to the equation:

-(7x+49)



We get rid of parentheses

-1x-7x-49+9=0

We add all the numbers together, and all the variables

-8x-40=0

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

-8x=40

x=40/-8

x=-5

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