Предмет: Алгебра, автор: OlegMerkinin2006

ПОМОГИТЕ ПОЖАЛУЙСТА,1 УПРАЖНЕНИЕ,СДЕЛАТЬ ПО ПРИМЕРУ НА ФОТО,ДАЮ ВСЕ СВОИ БАЛЛЫ (35).
3кг яблок и 4кг груш стоят 108 рублей.2 кг груш стоят столько же сколько 3кг яблок.Определите общую стоимость 1 кг груш и 1кг яблок

Приложения:

Ответы

Автор ответа: Пеппер

Ответ:

30 рублей.

Объяснение:

Яблоки - я, груши - г. Имеем систему уравнений:

3я+4г=108

3я=2г

3я=108-4г

3я=2г

108-4г=2г; 108=6г; г=18

1 кг груш стоит 18 руб, тогда 1 кг яблок стоит 3я=18*2; 3я=36; я=12 рублей. Их общая стоимость 18+12=30 рублей.

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