42=3(u+6)

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Solution for 42=3(u+6) equation: 



42=3(u+6)

We move all terms to the left:

42-(3(u+6))=0



We calculate terms in parentheses: -(3(u+6)), so:

3(u+6)

We multiply parentheses

3u+18

Back to the equation:

-(3u+18)



We get rid of parentheses

-3u-18+42=0

We add all the numbers together, and all the variables

-3u+24=0

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

-3u=-24

u=-24/-3

u=+8

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