-3(u+5)=3u-21

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Solution for -3(u+5)=3u-21 equation: 



-3(u+5)=3u-21

We move all terms to the left:

-3(u+5)-(3u-21)=0

We multiply parentheses

-3u-(3u-21)-15=0

We get rid of parentheses

-3u-3u+21-15=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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