Question

I
$\frac{7}{9} \times - \frac{4}{27} = \frac{1}{18} \: \:$
​помогите пожалуйста

Answer 1

Ответ:

11/42.

Пошаговое объяснение:

7/9•х - 4/27 = 1/18

7/9•х = 4/27 + 1/18

7/9•х = 8/54 + 3/54

7/9•х = 11/54

х = 11/54 : 7/9

х = 11/54 • 9/7

х = (11•9)/(54•7)

х = (11•1)/(6•7)

х = 11/42

Проверка:

7/9•11/42 - 4/27 = 1/18

11/54 - 8/54 = 1/18

3/54 = 1/18

1/18 = 1/18 - верно.