(х + 4 5/12) * 3 = 6 1/3
х + 4 5/12 = 6 1/3 : 3 = 19/3 * 1/3 = 19/9 = 2 1/9
х = 2 1/9 - 4 5/12 = 2 4/36 - 4 15/36 = - (4 15/36 - 2 4/36) = - 2 11/36
х = - 2 целых 11/36
Проверка: (- 2 11/36 + 4 5/12) * 3 = 6 1/3
2 1/9 * 3 = 6 1/3
19/9 * 3 = 57/9 = 6 3/9 = 6 1/3
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
6(2х + 3) - 4(2х - 4) = 0
12х + 18 - 8х + 16 = 0
12х - 8х = - 18 - 16
4х = - 34
х = - 34 : 4
х = - 8,5
Проверка: 6(-8,5*2+3) - 4(-8,5*2-4) = 0
6 * (-14) - 4 * (-21) = 0
- 84 - (-84) = 0
- 84 + 84 = 0