Images Х 10

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Х 10. (Х - 10)(Х - 10). 5х10. (Х+10)=(5-Х). Х5 у 10 у<=10.
(Х - 10)(Х - 10). 5х10. (Х+10)=(5-Х). Х5 у 10 у<=10.

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