princess12348 1) (1 / 7) * x = 1
    x = 1 / (1 / 7)
    x = 1 * (7 / 1)
    x = 7

2) 9 * x = 1
    x = 1 / 9

3) (1 + (5 / 8)) * x = 1
    (8 / 8 + 5 / 8) * x = 1
    (13 / 8) * x = 1
    x = 1 / (13 / 8)
    x = 1 * (8 / 13)
    x = 8 / 13

4) (1 / 2) * x = 1
    x = 1 / (1 / 2)
    x = 1 * (2 / 1)
    x = 1 * 2
    x = 2

5) 5 * x = 1
    x = 1 / 5

6) (1 / 10) * x = 1
     x = 1 / (1 / 10)
     x = 1 * (10 / 1)
     x = 10

7) (3 + (2 / 5)) * x = 1
    (15 / 5 + 2 / 5) * x = 1
    (17 / 5) * x = 1
    x = 1 / (17 / 5)
    x = 5 / 17

8) 100 * x = 1
     x = 1 / 100

5 звездочек поставьте уж