Предмет: Математика, автор: mx106250966


юра, саша и оля купили вместе энциклопедический справочник. юра заплатил 7/16 стоимости справочника, саша 8/15 остатка, а оля 21 грн

Ответы

Автор ответа: Konstantin101216
0

Ответ:

720 грн

Пошаговое объяснение:

Юра заплатил 105/240 от всей цены

Саша заплатил 128/240 от всей цены

Значит Оля заплатила 7/240

21=7х/240

х=720 грн

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