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(x+1.2)(2x-1/3)=0
We add all the numbers together, and all the variables
(x+1.2)(+2x-1/3)=0
We multiply parentheses ..
(+2x^2-1x^2+2.4x+1.2*-1/3)=0
We multiply all the terms by the denominator
(+2x^2-1x^2+2.4x+1.2*-1=0
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