4=-3u-u

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Solution for 4=-3u-u equation: 



4=-3u-u

We move all terms to the left:

4-(-3u-u)=0

We add all the numbers together, and all the variables

-(-4u)+4=0

We get rid of parentheses

4u+4=0

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

4u=-4

u=-4/4

u=-1

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