u+12=4u-6

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Solution for u+12=4u-6 equation: 



u+12=4u-6

We move all terms to the left:

u+12-(4u-6)=0

We get rid of parentheses

u-4u+6+12=0

We add all the numbers together, and all the variables

-3u+18=0

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

-3u=-18

u=-18/-3

u=+6

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