31=-7u+4(u+7)

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Solution for 31=-7u+4(u+7) equation: 



31=-7u+4(u+7)

We move all terms to the left:

31-(-7u+4(u+7))=0



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

-7u+4(u+7)

We multiply parentheses

-7u+4u+28

We add all the numbers together, and all the variables

-3u+28

Back to the equation:

-(-3u+28)



We get rid of parentheses

3u-28+31=0

We add all the numbers together, and all the variables

3u+3=0

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

3u=-3

u=-3/3

u=-1

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