1)

2/7x = 1

x = 1 : 2/7

x = 1 * 7/2

x = 7/2

x = 3,5

Ответ: 3,5

2)

9x = 1

x = 1/9

Ответ: 1/9

3)

1 5/8 x = 1

13/8x = 1

x = 1 : 13/8

x = 1 * 8/13

x = 8/13

Ответ: 8/13

4)

1/2x = 1

x = 1 : 1/2

x = 1 * 2

x = 2

Ответ: 2

5)

7/15x = 1

x = 1 : 7/15

x = 1 * 15/7

x = 15/7

x = 2 1/7

Ответ: 2 1/7

6)

3 2/5 x = 1

17/5x = 1

x = 1 : 17/5

x = 1 * 5/17

x = 5/17

Ответ: 5/17

7)

100x = 1

x = 1/100

x = 0,01

Ответ: 0,01

8)

2/13x = 1

x = 1 : 2/13

x = 1 * 13/2

x = 13/2

x = 6,5

Ответ: 6,5