18-6x=9+21x

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Solution for 18-6x=9+21x equation: 



18-6x=9+21x

We move all terms to the left:

18-6x-(9+21x)=0

We add all the numbers together, and all the variables

-6x-(21x+9)+18=0

We get rid of parentheses

-6x-21x-9+18=0

We add all the numbers together, and all the variables

-27x+9=0

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

-27x=-9

x=-9/-27

x=1/3

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