9x-12=3(4x-7)

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Solution for 9x-12=3(4x-7) equation: 



9x-12=3(4x-7)

We move all terms to the left:

9x-12-(3(4x-7))=0



We calculate terms in parentheses: -(3(4x-7)), so:

3(4x-7)

We multiply parentheses

12x-21

Back to the equation:

-(12x-21)



We get rid of parentheses

9x-12x+21-12=0

We add all the numbers together, and all the variables

-3x+9=0

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

-3x=-9

x=-9/-3

x=+3

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