31=-8u+5(u+8)

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Solution for 31=-8u+5(u+8) equation: 



31=-8u+5(u+8)

We move all terms to the left:

31-(-8u+5(u+8))=0



We calculate terms in parentheses: -(-8u+5(u+8)), so:

-8u+5(u+8)

We multiply parentheses

-8u+5u+40

We add all the numbers together, and all the variables

-3u+40

Back to the equation:

-(-3u+40)



We get rid of parentheses

3u-40+31=0

We add all the numbers together, and all the variables

3u-9=0

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

3u=9

u=9/3

u=3

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