-3(1+u)=9

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Solution for -3(1+u)=9 equation: 



-3(1+u)=9

We move all terms to the left:

-3(1+u)-(9)=0

We add all the numbers together, and all the variables

-3(u+1)-9=0

We multiply parentheses

-3u-3-9=0

We add all the numbers together, and all the variables

-3u-12=0

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

-3u=12

u=12/-3

u=-4

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