Предмет: Русский язык, автор: ivan315

купили 16 тетрадей по 22 копейки и по 45 копеек,заплатив за всю покупку 4р 67к.сколько купили тетрадей каждого вида

Ответы

Автор ответа: chocolate00

x+y=16
22x+45y=467

x=16-y
22(16-y)+45y=467
352-22y+45y=467
23=115:23
y=5 по 45 копеек
x=16-5
x=11 по 22 копейки

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