80=-10(u+3)

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Solution for 80=-10(u+3) equation: 



80=-10(u+3)

We move all terms to the left:

80-(-10(u+3))=0



We calculate terms in parentheses: -(-10(u+3)), so:

-10(u+3)

We multiply parentheses

-10u-30

Back to the equation:

-(-10u-30)



We get rid of parentheses

10u+30+80=0

We add all the numbers together, and all the variables

10u+110=0

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

10u=-110

u=-110/10

u=-11

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