8X+x=3(x-12)

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Solution for 8X+x=3(x-12) equation: 



8X+X=3(X-12)

We move all terms to the left:

8X+X-(3(X-12))=0

We add all the numbers together, and all the variables

9X-(3(X-12))=0



We calculate terms in parentheses: -(3(X-12)), so:

3(X-12)

We multiply parentheses

3X-36

Back to the equation:

-(3X-36)



We get rid of parentheses

9X-3X+36=0

We add all the numbers together, and all the variables

6X+36=0

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

6X=-36

X=-36/6

X=-6

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