4=7u-3u

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Solution for 4=7u-3u equation: 



4=7u-3u

We move all terms to the left:

4-(7u-3u)=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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