(1-x)-1/9=2/9, (5-x)+2 1/6=5 5/6,(8-x)- 3 2/15=2

1) (1 - x) - 1/9 = 2/9;

1 - x = 2/9 + 1/9;

1 - x = (2 + 1)/9;

1 - x = 3/9;

1 - 3/9 = х;

х = 1 - 1/3 = 3/3 - 1/3 = (3 - 1)/3 = 2/3.

Ответ: х = 2/3.

2) (5 - x) + 2 1/6 = 5 5/6;

(5 - x) + (2 * 6 + 1)/6 = (5 * 6 + 5)/6;

(5 - x) + (12 + 1)/6 = (30 + 5)/6;

5 - x + 13/6 = 35/6;

5 + 13/6 - 35/6 = х;

х = 30/6 + 13/6 - 35/6 = (30 + 13 - 35)/6 = 8/6 = 4/3.

Ответ: х = 4/3.

3) (8 - x) - 3 2/15 = 2;

8 - x - (3 * 15 + 2)/15 = 2;

8 - x - 47/15 = 2;

8 - 47/15 - 2 = х;

х = 6 - 47/15 = 90/15 - 47/15 = (90 - 47)/15 = 43/15.

Ответ: х = 43/15.