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3x^2x/3=18
We move all terms to the left:
3x^2x/3-(18)=0
We multiply all the terms by the denominator
3x^2x-18*3=0
We add all the numbers together, and all the variables
3x^2x-54=0
We move all terms containing x to the left, all other terms to the right
3x^2x=54
x=54/1
x=54
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