Предмет: Математика, автор: nadija160

На полиці стоять чашки. Спочат­ку взяли третю частину чашок без 2, а потім половину решти. Після цього на полиці залишилось 9 чашок. Скільки чашок було на полиці

Ответы

Автор ответа: genius20
0
Позначимо одну чашку як ікс:

1/2(x-1/3x+2)=9\1/2x-1/6x+1=9\1/3x=8\x=24.

Відповідь: було 24 чашки.
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