-18=-2u+6(u+3)

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Solution for -18=-2u+6(u+3) equation: 



-18=-2u+6(u+3)

We move all terms to the left:

-18-(-2u+6(u+3))=0



We calculate terms in parentheses: -(-2u+6(u+3)), so:

-2u+6(u+3)

We multiply parentheses

-2u+6u+18

We add all the numbers together, and all the variables

4u+18

Back to the equation:

-(4u+18)



We get rid of parentheses

-4u-18-18=0

We add all the numbers together, and all the variables

-4u-36=0

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

-4u=36

u=36/-4

u=-9

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