9u+3(u-10)=15u+3(3)

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Solution for 9u+3(u-10)=15u+3(3) equation: 



9u+3(u-10)=15u+3(3)

We move all terms to the left:

9u+3(u-10)-(15u+3(3))=0

We multiply parentheses

9u+3u-(15u+33)-30=0

We get rid of parentheses

9u+3u-15u-33-30=0

We add all the numbers together, and all the variables

-3u-63=0

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

-3u=63

u=63/-3

u=-21

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