-3(u+4)=-9u+42

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Solution for -3(u+4)=-9u+42 equation: 



-3(u+4)=-9u+42

We move all terms to the left:

-3(u+4)-(-9u+42)=0

We multiply parentheses

-3u-(-9u+42)-12=0

We get rid of parentheses

-3u+9u-42-12=0

We add all the numbers together, and all the variables

6u-54=0

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

6u=54

u=54/6

u=9

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