Предмет: Математика, автор: loko07

2 /13 : х - 1 1/6 = 1 5/9
Помогите пожалуйста, даю 30 баллов!​

Ответы

Автор ответа: khilkoev
0

Для удобства, переведем дроби в изначальный их вид:

2 1/3 = 7/3;

1 1/6 = 7/6;

1 5/9 = 14/9.

Теперь соберем и решим уравнение:

7/3 : х - 7/6 = 14/9;

7/3 : х = 14/9 + 7/6;

7/3 : х = 14 * 2 / 9 * 2 + 7 * 3 / 6 * 3;

7/3 : х = 28/18 + 21/18;

7/3 : х = 49/18;

7/3х = 49/18;

7/3х * 3х = 49/18 * 3х;

7/1 = 49х/6;

7/1 : 1/6 = 49х;

7/1 * 6/1 = 49х;

42 = 49х;

х = 42/49;

х = 6/7.

Проверка: 7/3 : 6/7 - 7/6 = 7/3 * 7/6 - 7/6 = 49/18 - 7/6 = 49/18 - 21/18 = 28/18 = 14/9.

14/9 = 14/9.

Ответ: х = 6/7.

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