13=-8u+5(u+5)

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Solution for 13=-8u+5(u+5) equation: 



13=-8u+5(u+5)

We move all terms to the left:

13-(-8u+5(u+5))=0



We calculate terms in parentheses: -(-8u+5(u+5)), so:

-8u+5(u+5)

We multiply parentheses

-8u+5u+25

We add all the numbers together, and all the variables

-3u+25

Back to the equation:

-(-3u+25)



We get rid of parentheses

3u-25+13=0

We add all the numbers together, and all the variables

3u-12=0

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

3u=12

u=12/3

u=4

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