-9=-7u+3(u+5)

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Solution for -9=-7u+3(u+5) equation: 



-9=-7u+3(u+5)

We move all terms to the left:

-9-(-7u+3(u+5))=0



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

-7u+3(u+5)

We multiply parentheses

-7u+3u+15

We add all the numbers together, and all the variables

-4u+15

Back to the equation:

-(-4u+15)



We get rid of parentheses

4u-15-9=0

We add all the numbers together, and all the variables

4u-24=0

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

4u=24

u=24/4

u=6

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