3,8 * (x/2-1 1/6) = 19/20

3,8 * (x/2 - 1 1/6) = 19/20

38/10 * (х/2 - 7/6) = 19/20

38/10 * х/2 - 38/10 * 7/6 = 19/20

38 х/20 - 266/60 = 19/20

19 х/10 = 266/60 + 19/20

19/10 х = 323/60

х = 323/60 : 19/10

х = 323/60 * 10/19

х = 3230/1140=17/6 = 2 5/6

Значит ответ х = 2 5/6 ≈ 2.83333