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2x^2+18=12x^2x2+18=12x
We move all terms to the left:
2x^2+18-(12x^2x2+18)=0
We get rid of parentheses
2x^2-12x^2x2-18+18=0
We add all the numbers together, and all the variables
2x^2-12x^2x2=0
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