Предмет: Математика, автор: Arzu129

Из 30 учеников класса за письменную работу 8 учеников получили "5", 3/5 всего класса получили "4" , а остальные "3". Сколько учеников получили "3"?

Ответы

Автор ответа: nekonja

Пусть х - троечники.
8+3/5·30+х=30
8+18+х=30
х=30-26
х=4 - троечника

Автор ответа: jkhdjfhd

(30:5)×3=18 ПОЛУЧИЛИ 4
30-8-18=4 ОТВЕТ 4УЧ.ПОЛУЧИЛИ 3

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