Предмет: Математика, автор: hhh555

задуманно число.его умножили на 5 и разделили на 4.в итоге получилось 12.какое число было задумано

Ответы

Автор ответа: Latac

Пусть загаданное число - х.

Тогда:
x*5/4=12
x=12/(5/4)
x=12*4/5
x=9,6

Проверка:
9,6*5=48
48/4=12

Ответ: 9,6

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