3x-9=12x+18

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Solution for 3x-9=12x+18 equation: 



3x-9=12x+18

We move all terms to the left:

3x-9-(12x+18)=0

We get rid of parentheses

3x-12x-18-9=0

We add all the numbers together, and all the variables

-9x-27=0

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

-9x=27

x=27/-9

x=-3

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