-3u-42=-8(u+9)

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Solution for -3u-42=-8(u+9) equation: 



-3u-42=-8(u+9)

We move all terms to the left:

-3u-42-(-8(u+9))=0



We calculate terms in parentheses: -(-8(u+9)), so:

-8(u+9)

We multiply parentheses

-8u-72

Back to the equation:

-(-8u-72)



We get rid of parentheses

-3u+8u+72-42=0

We add all the numbers together, and all the variables

5u+30=0

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

5u=-30

u=-30/5

u=-6

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