12=2(x+9)

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Solution for 12=2(x+9) equation: 



12=2(x+9)

We move all terms to the left:

12-(2(x+9))=0



We calculate terms in parentheses: -(2(x+9)), so:

2(x+9)

We multiply parentheses

2x+18

Back to the equation:

-(2x+18)



We get rid of parentheses

-2x-18+12=0

We add all the numbers together, and all the variables

-2x-6=0

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

-2x=6

x=6/-2

x=-3

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