-31=8(u-2)+7u

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Solution for -31=8(u-2)+7u equation: 



-31=8(u-2)+7u

We move all terms to the left:

-31-(8(u-2)+7u)=0



We calculate terms in parentheses: -(8(u-2)+7u), so:

8(u-2)+7u

We add all the numbers together, and all the variables

7u+8(u-2)

We multiply parentheses

7u+8u-16

We add all the numbers together, and all the variables

15u-16

Back to the equation:

-(15u-16)



We get rid of parentheses

-15u+16-31=0

We add all the numbers together, and all the variables

-15u-15=0

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

-15u=15

u=15/-15

u=-1

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