-7=-7u+4(u+5)

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Solution for -7=-7u+4(u+5) equation: 



-7=-7u+4(u+5)

We move all terms to the left:

-7-(-7u+4(u+5))=0



We calculate terms in parentheses: -(-7u+4(u+5)), so:

-7u+4(u+5)

We multiply parentheses

-7u+4u+20

We add all the numbers together, and all the variables

-3u+20

Back to the equation:

-(-3u+20)



We get rid of parentheses

3u-20-7=0

We add all the numbers together, and all the variables

3u-27=0

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

3u=27

u=27/3

u=9

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