u=8+2u

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Solution for u=8+2u equation: 



u=8+2u

We move all terms to the left:

u-(8+2u)=0

We add all the numbers together, and all the variables

u-(2u+8)=0

We get rid of parentheses

u-2u-8=0

We add all the numbers together, and all the variables

-1u-8=0

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

-u=8

u=8/-1

u=-8

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