13=-7x+4(x+7)

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Solution for 13=-7x+4(x+7) equation: 



13=-7x+4(x+7)

We move all terms to the left:

13-(-7x+4(x+7))=0



We calculate terms in parentheses: -(-7x+4(x+7)), so:

-7x+4(x+7)

We multiply parentheses

-7x+4x+28

We add all the numbers together, and all the variables

-3x+28

Back to the equation:

-(-3x+28)



We get rid of parentheses

3x-28+13=0

We add all the numbers together, and all the variables

3x-15=0

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

3x=15

x=15/3

x=5

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