-3u-13=8

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Solution for -3u-13=8 equation: 



-3u-13=8

We move all terms to the left:

-3u-13-(8)=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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