-31=-7u+5(u+7)

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Solution for -31=-7u+5(u+7) equation: 



-31=-7u+5(u+7)

We move all terms to the left:

-31-(-7u+5(u+7))=0



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

-7u+5(u+7)

We multiply parentheses

-7u+5u+35

We add all the numbers together, and all the variables

-2u+35

Back to the equation:

-(-2u+35)



We get rid of parentheses

2u-35-31=0

We add all the numbers together, and all the variables

2u-66=0

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

2u=66

u=66/2

u=33

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