6х + 3(-8+4х) = - 6х - 4
6х - 24 + 12х = - 6х - 4
18х - 24 = - 6х - 4
18х + 6х = - 4 + 24
24х = 20
х = 20: 24
х = ⁵/₆
6 * (⁵/₆) + 3( - 8 + 4* (⁵/₆) ) = - 6 * (⁵/₆) - 4
5 + 3(- 8 + 3 ²/₆) = - 5 - 4
5 + 3 *( - 8 + 3 ¹/₃) = - 9
5 + 3 * (- 4 ²/₃ ) = - 9
5 + 3 * (- ¹⁴/₃) = - 9
5 - 14 = - 9
- 9 = - 9