18=3(x+12)-7x

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Solution for 18=3(x+12)-7x equation: 



18=3(x+12)-7x

We move all terms to the left:

18-(3(x+12)-7x)=0



We calculate terms in parentheses: -(3(x+12)-7x), so:

3(x+12)-7x

We add all the numbers together, and all the variables

-7x+3(x+12)

We multiply parentheses

-7x+3x+36

We add all the numbers together, and all the variables

-4x+36

Back to the equation:

-(-4x+36)



We get rid of parentheses

4x-36+18=0

We add all the numbers together, and all the variables

4x-18=0

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

4x=18

x=18/4

x=4+1/2

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