18+x=3x

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Solution for 18+x=3x equation: 



18+x=3x

We move all terms to the left:

18+x-(3x)=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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