3u=u+4

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Solution for 3u=u+4 equation: 



3u=u+4

We move all terms to the left:

3u-(u+4)=0

We get rid of parentheses

3u-u-4=0

We add all the numbers together, and all the variables

2u-4=0

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

2u=4

u=4/2

u=2

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