-8+u=-3u

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Solution for -8+u=-3u equation: 



-8+u=-3u

We move all terms to the left:

-8+u-(-3u)=0

We get rid of parentheses

u+3u-8=0

We add all the numbers together, and all the variables

4u-8=0

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

4u=8

u=8/4

u=2

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