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x.x/6=18
We move all terms to the left:
x.x/6-(18)=0
We multiply all the terms by the denominator
x.x-18*6=0
We add all the numbers together, and all the variables
x.x-108=0
We move all terms containing x to the left, all other terms to the right
x.x=108
x=108/1
x=108
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