12=-2(-9-7x)

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Solution for 12=-2(-9-7x) equation: 



12=-2(-9-7x)

We move all terms to the left:

12-(-2(-9-7x))=0

We add all the numbers together, and all the variables

-(-2(-7x-9))+12=0



We calculate terms in parentheses: -(-2(-7x-9)), so:

-2(-7x-9)

We multiply parentheses

14x+18

Back to the equation:

-(14x+18)



We get rid of parentheses

-14x-18+12=0

We add all the numbers together, and all the variables

-14x-6=0

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

-14x=6

x=6/-14

x=-3/7

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