Предмет: Алгебра, автор: botashka777

Два трактора могут вспахать поле на 18 ч быстрее ,чем один первый трактор , и на 32 ч быстрее ,чем один второй . За сколько часов каждый трактор может вспахать все поле ?

Ответы

Автор ответа: Ivanna2013

0

первый х, второй у

(1/х +1/у) +1/18 = 1/х

(1/х +1/у) +1/32 = 1/у

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