12x+3x=9(x-6)

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Solution for 12x+3x=9(x-6) equation: 



12x+3x=9(x-6)

We move all terms to the left:

12x+3x-(9(x-6))=0

We add all the numbers together, and all the variables

15x-(9(x-6))=0



We calculate terms in parentheses: -(9(x-6)), so:

9(x-6)

We multiply parentheses

9x-54

Back to the equation:

-(9x-54)



We get rid of parentheses

15x-9x+54=0

We add all the numbers together, and all the variables

6x+54=0

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

6x=-54

x=-54/6

x=-9

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