Question

помогите пожалуйста дам 25 баллов\/??-'/'?!​

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

(9 1/4 - 8 2/3) * 1 5/7 + (4 2/9 - 2 5/6) = 2 7/18,

1) 9 1/4 - 8 2/3 = 9 3/12 - 8 8/12 = 8 15/12 - 8 8/12 = 7/12,

2) 7/12 * 1 5/7 = 7/12 * 12/7 = 1,

3) 4 2/9 - 2 5/6 = 4 4/18 - 2 15/18 = 3 22/18 - 2 15/18 = 1 7/18,

4) 1 + 1 7/18 = 2 7/18

2 3/11 * 7/9 + 6 8/11 : 1 2/7 - 1 1/8  =

= 2 3/11 * 7/9 + 6 8/11 : 9/7 - 1 1/8  =

= 2 3/11 * 7/9 + 6 8/11 * 7/9 - 1 1/8  =

= 7/9 * (2 3/11 + 6 8/11) - 1 1/8 =

= 7/9 * 9 - 1 1/8 = 7 - 1 1/8 = 6 8/8 - 1 1/8 = 5 7/8

8 7/39 - х = 5 9/26,

х = 8 7/39 - 5 9/26,

х = 8 14/78 - 5 27/78,

х = 7 92/78 - 5 27/78,

х = 2 65/78