Question

2) 3 : 1 1/5х - 1:х=1/2

Answer 1

Ответ:

3

Пошаговое объяснение:

3 : 1 1/5х - 1 : х = 1/2

3/ (1 1/5х) - 1/х = 1/2

3/ (6/5х) - 1/х = 1/2

3/ (6/5х) - (6/5 / 6/5х) = 1/2

(3-6/5)/6/5х = 1/2

(2 5/5 - 1 1/5)/6/5х = 1/2

1 4/5 /(6/5)х = 1/2

6/5х = 1 4/5 : 1/2

6/5х = 9/5 * 2/1

6/5х = 18/5

х = 18/5 : 6/5

х = 18/5 * 5/6

х = 3/1 * 1/1

х = 3/1

х = 3