-6=-2u+15+3u

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Solution for -6=-2u+15+3u equation: 



-6=-2u+15+3u

We move all terms to the left:

-6-(-2u+15+3u)=0

We add all the numbers together, and all the variables

-(u+15)-6=0

We get rid of parentheses

-u-15-6=0

We add all the numbers together, and all the variables

-1u-21=0

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

-u=21

u=21/-1

u=-21

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