Question

Помогите решить с фото. Номер 426

Answer 1

((5/18 - 4/15) : 1/6 + 3 14/15) : 0,8                               Х
----------------------------------------------- = ----------------------------------- 
    3 1/25 * 5/12 - 2/3                                 1 3/8 : (4 5/16 - 3 1/6)
     
1) 5/18 - 4/15 = 25/90 - 24/90 = 1/90
2) 1/90 : 1/6 = 1/90 * 6/1 = 6/90 = 1/15
3) 1/15 + 3 14/5 = 3 15/15 = 4
4) 4 : 0,8 = 4/1 : 8/10 = 4/1 * 10/8 = 40/8 = 5
5) 3 1/25 * 5/12 = 76/25 * 5/12 = 19/5 * 1/3 = 19/15
6) 19/15 - 2/3 = 19/15 - 10/15 = 9/15 = 3/5
7) 4 5/16 - 3 1/6 = 4 15/48 - 3 8/48 = 1 7/48
8) 1 3/8 : 1 7/48 = 11/8 : 55/48 = 11/8 * 48/55 = 1/1 * 6/5 = 6/5 = 1 1/5
  
   5            Х
------- =  ---------
 3/5         1 1/5

3/5х = 5 * 1 1/5
3/5х = 5 * 6/5
3/5х = 6
х = 6 : 3/5
х = 6/1 * 5/3
х = 30/3
х = 10