40=8(10+u)

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Solution for 40=8(10+u) equation: 



40=8(10+u)

We move all terms to the left:

40-(8(10+u))=0

We add all the numbers together, and all the variables

-(8(u+10))+40=0



We calculate terms in parentheses: -(8(u+10)), so:

8(u+10)

We multiply parentheses

8u+80

Back to the equation:

-(8u+80)



We get rid of parentheses

-8u-80+40=0

We add all the numbers together, and all the variables

-8u-40=0

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

-8u=40

u=40/-8

u=-5

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