-17=4+3u

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Solution for -17=4+3u equation: 



-17=4+3u

We move all terms to the left:

-17-(4+3u)=0

We add all the numbers together, and all the variables

-(3u+4)-17=0

We get rid of parentheses

-3u-4-17=0

We add all the numbers together, and all the variables

-3u-21=0

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

-3u=21

u=21/-3

u=-7

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