3u-15=-7(u+5)

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Solution for 3u-15=-7(u+5) equation: 



3u-15=-7(u+5)

We move all terms to the left:

3u-15-(-7(u+5))=0



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

-7(u+5)

We multiply parentheses

-7u-35

Back to the equation:

-(-7u-35)



We get rid of parentheses

3u+7u+35-15=0

We add all the numbers together, and all the variables

10u+20=0

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

10u=-20

u=-20/10

u=-2

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