Вовощехранилище было 1 280 ц моркови. когда увезли морковь в магазины на 24 машинах, поровну на каждой, то в овощехранилище осталось 536 ц моркови.сколько центнеров моркови увезли на каждой машине? хватит ли 17 таких машин, чтобы вывезти оставшуюся морковь?

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Пошаговое объяснение:

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ответ;

Пусть детский билет стоит — х рублей, а взрослый билет — у рублей. Тогда первая семья заплатила: х · 2 + у = 440 (руб.), а вторая семья: х · 3 + у · 2 = 789 (руб.). Выразим из первого уравнения значение y

(у = 440 – х · 2) и подставим его во второе уравнение:

х · 3 + (440 – х · 2) · 2 = 780;

х · 3 + 880 – х · 4 = 780;

- х = 780 – 880;

- х = - 100;

х = 100 (руб.) — цена детского билета.

Найдем цену взрослого билета: у = 440 – х · 2 = 440 – 100 · 2 = 240 (руб.).

ответ: один детский билет стоит 100 рублей, а взрослый — 240 рублей.