помогите решить (х-11 7/9) + 5 5/18 = 7 4/12

(х - 11 7/9) + 5 5/18 = 7 4/12

(х - 106/9) + 95/18 = 88/12

х - 106/9 = 88/12 - 95/18

х - 106/9 = 264/36 - 190/36

х - 106/9 = 74/36

х = 74/36 + 106/9

х = 74/36 + 424/36

х = 498/36

х = 249/18

х = 13 15/18

х = 13 5/6

проверка:

(13 5/6 - 11 7/9) + 5 5/18 = 7 4/12

(83/6 - 106/9) + 95/18 = 88/12

(249/18 - 212/18) + 95/18 = 88/12

37/18 + 95/18 = 88/12

132/18 = 88/12

22/3 = 22/3