3(u-9)=9u-21

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Solution for 3(u-9)=9u-21 equation: 



3(u-9)=9u-21

We move all terms to the left:

3(u-9)-(9u-21)=0

We multiply parentheses

3u-(9u-21)-27=0

We get rid of parentheses

3u-9u+21-27=0

We add all the numbers together, and all the variables

-6u-6=0

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

-6u=6

u=6/-6

u=-1

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