-9x+3x-12=3(5x+x)

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Solution for -9x+3x-12=3(5x+x) equation: 



-9x+3x-12=3(5x+x)

We move all terms to the left:

-9x+3x-12-(3(5x+x))=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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



We calculate terms in parentheses: -(3(+6x)), so:

3(+6x)

We multiply parentheses

18x

Back to the equation:

-(18x)



We add all the numbers together, and all the variables

-24x-12=0

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

-24x=12

x=12/-24

x=-1/2

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