x=3(12-x)

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Solution for x=3(12-x) equation: 



x=3(12-x)

We move all terms to the left:

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

We add all the numbers together, and all the variables

x-(3(-1x+12))=0



We calculate terms in parentheses: -(3(-1x+12)), so:

3(-1x+12)

We multiply parentheses

-3x+36

Back to the equation:

-(-3x+36)



We get rid of parentheses

x+3x-36=0

We add all the numbers together, and all the variables

4x-36=0

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

4x=36

x=36/4

x=9

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