Предмет: Математика, автор: smuzi14

4. Розв'яжи задачу.
Дівчинка задумала число, потім збільшила його в 3 2/3 раза
До отриманого добутку додала 5,4 й у результаті отримала 7,6. Яке число задумала дівчинка?​

Ответы

Автор ответа: dyexfnf
18

Ответ: задумане число 0,6

Пошаговое объяснение:

Нехай задумане число - х

3 2/3 х + 5,4 = 7,6

3 2/3 х = 7,6 - 5,4

3 2/3 х = 2,2

х= 2 1/5 : 3 2/3

х= 11/5 : 11/3

х= 11/5 * 3/11

х= 3/5 = 0,6

viktoriaonisko96: а где взялось 21/5?
09Masha90: аххах, это 2 целых 1/5
dyexfnf: 2,2 = 2 1/5
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