-13=-7u+2(u+6)

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Solution for -13=-7u+2(u+6) equation: 



-13=-7u+2(u+6)

We move all terms to the left:

-13-(-7u+2(u+6))=0



We calculate terms in parentheses: -(-7u+2(u+6)), so:

-7u+2(u+6)

We multiply parentheses

-7u+2u+12

We add all the numbers together, and all the variables

-5u+12

Back to the equation:

-(-5u+12)



We get rid of parentheses

5u-12-13=0

We add all the numbers together, and all the variables

5u-25=0

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

5u=25

u=25/5

u=5

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