Предмет: Математика, автор: subotovskaao

У пакунку лежать мандарини. Якщо роздавати їх дітям по 5 мандаринів кожному, то не вистачить 3 мандаринів, а якщо роздати по 4 мандарини, то в пакунку залишиться ще 15 мандаринів. Скільки мандаринів міститься в пакунку?

Ответы

Автор ответа: Accidentalgenius11

Ответ:

87 мандаринов

Пошаговое объяснение:

Основываясь на данной нам информации и обозначив кол-во детей за Х составим и решим уравнение:

х · 4 + 15 = х · 5 - 3

4х + 15 = 5х - 3

Перенесём известные в одну сторону, неизвестные в другую

4х - 5х = -3 - 15

-х = -18

х = 18

Теперь мы знаем что детей было 18, исходя из этого можем решить задачу:

18 · 4 + 15 = 72 + 15 = 87

18 · 5 - 3 = 90 - 3 = 87

87 = 87, значит всё верно

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