18+x=3(x+12)

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Solution for 18+x=3(x+12) equation: 



18+x=3(x+12)

We move all terms to the left:

18+x-(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

x-3x-36+18=0

We add all the numbers together, and all the variables

-2x-18=0

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

-2x=18

x=18/-2

x=-9

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