6X+6x-9+3x+6=18

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Solution for 6X+6x-9+3x+6=18 equation: 



6X+6X-9+3X+6=18

We move all terms to the left:

6X+6X-9+3X+6-(18)=0

We add all the numbers together, and all the variables

15X-21=0

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

15X=21

X=21/15

X=1+2/5

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