Images 2Х Х

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2х х. Х2-9х -20. Х^2-9х+20=20. 20/Х=9-Х. 2х+х+2 20.
Х2-9х -20. Х^2-9х+20=20. 20/Х=9-Х. 2х+х+2 20.

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