13=7(x+7)+2x

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Solution for 13=7(x+7)+2x equation: 



13=7(x+7)+2x

We move all terms to the left:

13-(7(x+7)+2x)=0



We calculate terms in parentheses: -(7(x+7)+2x), so:

7(x+7)+2x

We add all the numbers together, and all the variables

2x+7(x+7)

We multiply parentheses

2x+7x+49

We add all the numbers together, and all the variables

9x+49

Back to the equation:

-(9x+49)



We get rid of parentheses

-9x-49+13=0

We add all the numbers together, and all the variables

-9x-36=0

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

-9x=36

x=36/-9

x=-4

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