Question

помогите пожайлуста я добр на баллы

Answer 1

Ответ:

Пошаговое объяснение:

1) 3/7 * 5/6 = 15/42 = 5/14

2) 5/14 : 3/7 = 5/14 * 7/3 = 5/6

3) 5/14 : 5/6 + 5/7 = 5/14 * 6/5 + 5/7 = 30/70 + 5/7 = 3/7 + 5/7 = 8/7 = 1 1/7

4) 8/13 * 4 1/3 = 8/13 * 13/3 = 8/3 = 2 2/3

5) 9 : 3/4 = 9 * 4/3 = 9 : 3 * 4 = 12

6) 9/16 : 36 = 9/16 * 1/36 = 1/16 * 1/4 = 1/64

7) 3 1/3 : 2 6/7 = 10/3 : 20/7 = 10/3 * 7/20 = 7/6 = 1 1/6

8) 5 5/8 * 1 5/36 = 45/8 * 41/36 = 5/8 * 41/4 = 205/32 = 6 13/36

№2

5/7х = 1

х = 1 : 5/7

х = 7/5

2)

6/15х = 3/5

х = 3/5 : 6/15

х = 3/5 * 15/6

х = 3/2 = 1 1/2

3)

2 1/3 х - 2 3/5 = 1 2/15

2 1/3х = 1 2/15 + 2 3/5

2 1/3х = 1 2/15 + 2 9/15

2 1/3х = 3 11/15

х = 3 11/15 : 2 1/3

х = 56/15 : 7/3

х = 56/15 * 3/7

х = 8/5

х = 1 3/5

4)

(х - 1 1/2) = 3 1/2

х = 3 1/2 + 1 1/2

х = 4 2/2

х = 5