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6x-3x/2=18

We move all terms to the left:

6x-3x/2-(18)=0

We multiply all the terms by the denominator

6x*2-3x-18*2=0

We add all the numbers together, and all the variables

-3x+6x*2-36=0

Wy multiply elements

-3x+12x-36=0

We add all the numbers together, and all the variables

9x-36=0

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

9x=36

x=36/9

x=4

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