31=-3u+8(u+2)

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Solution for 31=-3u+8(u+2) equation: 



31=-3u+8(u+2)

We move all terms to the left:

31-(-3u+8(u+2))=0



We calculate terms in parentheses: -(-3u+8(u+2)), so:

-3u+8(u+2)

We multiply parentheses

-3u+8u+16

We add all the numbers together, and all the variables

5u+16

Back to the equation:

-(5u+16)



We get rid of parentheses

-5u-16+31=0

We add all the numbers together, and all the variables

-5u+15=0

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

-5u=-15

u=-15/-5

u=+3

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