2,25х = 2 1/4х
2 1/4х - 1 1/3 = - 3 - 1/4х
2 1/4х + 1/4х = - 3 + 1 1/3
2 2/4х = - 1 2/3
х = - 1 2/3 : 2 2/4
х = - 5/3 : 10/4
х = - 5/3 * 4/10
х = - 20/30
х = - 2/3
Проверка: 2 1/4 * (-2/3) - 1 1/3 = - 3 - 1/4 * (-2/3)
9/4 * (-2/3) - 1 1/3 = - 3 + 2/12
- 18/12 - 16/12 = - 2 10/12
- 34/12 = - 2 10/12
- 2 10/12 = - 2 10/12