4,036 (x-0,15x-0,4x) = 5,4486

4,036 (x - 0,15x - 0,4x) = 5,4486

4 36/1000 (х - 15/100 - 4/10 х) = 5 4486/10000

4036/1000 (х - 15/100 - 4/10 х) = 54486/10000

х - 15/100 - 4/10 х = 54486/10000 : 4036/1000

х - 15/100 - 4/10 х = 54486/10000 * 1000/4036

х - 15/100 - 4/10 х = 1000/10000 * 54486/4036

х - 15/100 - 4/10 х = 1/10 * 27243/2018

х - 15/100 - 4/10 х = 27243/20180

х - 4/10 х = 27243/20180 + 15/100

х - 4/10 х = 272430/201800 + 302700/201800

х - 4/10 х = (272430 + 302700) / 201800

х - 4/10 х = 57513/20180

x (1 - 4/10) = 57513/20180

x (10/10 - 4/10) = 57513/20180

x (10 - 4) / 10 = 57513/20180

6/10x = 57513/20180

3/5x = 57513/20180

x = 57513/20180 : 3/5

x = 57513/20180 * 5/3

x = 19171/3 * 1/4036

x = 19171 / (3 * 4036)

x = 19171/12108

x = 1 7063/12108

Ответ: 1 7063/12108