u-3u=12-u+5u

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Solution for u-3u=12-u+5u equation: 



u-3u=12-u+5u

We move all terms to the left:

u-3u-(12-u+5u)=0

We add all the numbers together, and all the variables

u-3u-(4u+12)=0

We add all the numbers together, and all the variables

-2u-(4u+12)=0

We get rid of parentheses

-2u-4u-12=0

We add all the numbers together, and all the variables

-6u-12=0

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

-6u=12

u=12/-6

u=-2

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