9-5х/2-4х/3

9 - 5х/2 - 4х/3 = 9 - (5х * 3)/(2 * 3) - (4х * 2)/(3 * 2) = 9 - 15х/6 - 8х/6 =
9 + (- 15х/6 - 8х/6) = 9 + (- 15х - 8х)/6 = 9 - (15х - 8х)/6 = 9 - х * (15 - 8)/6 = 9 - х * 7/6 = 9 - 1 1/6х

Ответ: 9 - 1 1/6х