18=3x+x+6

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Solution for 18=3x+x+6 equation: 



18=3x+x+6

We move all terms to the left:

18-(3x+x+6)=0

We add all the numbers together, and all the variables

-(4x+6)+18=0

We get rid of parentheses

-4x-6+18=0

We add all the numbers together, and all the variables

-4x+12=0

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

-4x=-12

x=-12/-4

x=+3

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