3u+28=7u

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Solution for 3u+28=7u equation: 



3u+28=7u

We move all terms to the left:

3u+28-(7u)=0

We add all the numbers together, and all the variables

-4u+28=0

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

-4u=-28

u=-28/-4

u=+7

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