u=2u-6

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Solution for u=2u-6 equation: 



u=2u-6

We move all terms to the left:

u-(2u-6)=0

We get rid of parentheses

u-2u+6=0

We add all the numbers together, and all the variables

-1u+6=0

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

-u=-6

u=-6/-1

u=+6

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