Предмет: Математика, автор: kaznakim9

5 детей съели Некоторое количество слив Лора съела на 2 сливы больше чем София. Бетти съела на три сливы меньше чем Лора . Клэр съела на одну сливы больше чем Бетти и на три сливы меньше чем Элис какие две девочки съели одинаковое количество слив

Клэр Лора
Клэр София
Лора Элис
София Элис
Элис и Бетти

Ответы

Автор ответа: pushpull

Ответ:

одинаковое количество слив съели София и Клэр.

Пошаговое объяснение:

Давайте считать "от Софии".

Для простоты обозначим число слив, которые съела София через х.

Тогда:

"Лора съела на 2 сливы больше чем София", (х + 2) сливы

"Бетти съела на три сливы меньше чем Лора" (х+2 -3) = (х-1) слива.

"Клэр съела на одну сливы больше чем Бетти" (х - 1 +1) = х слив.

"Клэр съела на три сливы меньше чем Элис",

значит Элис съела на 3 сливы больше, чем Клэр, (х+3) сливы.

Таким образом,

София съела х слив;

Лора съела (х+2) сливы;

Бетти съела (х-1) сливу;

Клэр съела х слив;

Элис съела (х+3) сливы.

Следовательно, одинаковое количество слив съели София и Клэр.

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