12=3x-2(4x+9)

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Solution for 12=3x-2(4x+9) equation: 



12=3x-2(4x+9)

We move all terms to the left:

12-(3x-2(4x+9))=0



We calculate terms in parentheses: -(3x-2(4x+9)), so:

3x-2(4x+9)

We multiply parentheses

3x-8x-18

We add all the numbers together, and all the variables

-5x-18

Back to the equation:

-(-5x-18)



We get rid of parentheses

5x+18+12=0

We add all the numbers together, and all the variables

5x+30=0

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

5x=-30

x=-30/5

x=-6

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