-9+3u=7+4u+u

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Solution for -9+3u=7+4u+u equation: 



-9+3u=7+4u+u

We move all terms to the left:

-9+3u-(7+4u+u)=0

We add all the numbers together, and all the variables

3u-(5u+7)-9=0

We get rid of parentheses

3u-5u-7-9=0

We add all the numbers together, and all the variables

-2u-16=0

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

-2u=16

u=16/-2

u=-8

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