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1.20 x. 2x+1/3-4x-x2/12 x2-4/9. X-2/5+2x-5/4+4x-1/20=4-x. (4x -3)/2 +(2x-1)(2x+1)=24. X3+5x=4x+20.
2x+1/3-4x-x2/12 x2-4/9. X-2/5+2x-5/4+4x-1/20=4-x. (4x -3)/2 +(2x-1)(2x+1)=24. X3+5x=4x+20.

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