13=-7u+5(u+5)

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Solution for 13=-7u+5(u+5) equation: 



13=-7u+5(u+5)

We move all terms to the left:

13-(-7u+5(u+5))=0



We calculate terms in parentheses: -(-7u+5(u+5)), so:

-7u+5(u+5)

We multiply parentheses

-7u+5u+25

We add all the numbers together, and all the variables

-2u+25

Back to the equation:

-(-2u+25)



We get rid of parentheses

2u-25+13=0

We add all the numbers together, and all the variables

2u-12=0

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

2u=12

u=12/2

u=6

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