6-(-2u)=18

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Solution for 6-(-2u)=18 equation: 



6-(-2u)=18

We move all terms to the left:

6-(-2u)-(18)=0

We add all the numbers together, and all the variables

-(-2u)-12=0

We get rid of parentheses

2u-12=0

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

2u=12

u=12/2

u=6

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