13=-7u+5(u+3)

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Solution for 13=-7u+5(u+3) equation: 



13=-7u+5(u+3)

We move all terms to the left:

13-(-7u+5(u+3))=0



We calculate terms in parentheses: -(-7u+5(u+3)), so:

-7u+5(u+3)

We multiply parentheses

-7u+5u+15

We add all the numbers together, and all the variables

-2u+15

Back to the equation:

-(-2u+15)



We get rid of parentheses

2u-15+13=0

We add all the numbers together, and all the variables

2u-2=0

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

2u=2

u=2/2

u=1

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