3 * 14 + 3 * 12x - 2 * 3x = 6x + 4
42 + 36x - 6x = 6x + 4
42 + 30x = 6x + 4
30x - 6x = 4 - 42
24x = -38
x = -38 / 24
x = -19 / 12
Ответ: x = -19/12
5 + 2x = 3 * 2x - 3 * 5 - 8
5 + 2x = 6x - 15 - 8
5 + 2x = 6x - 23
2x - 6x = -23 - 5
-4x = -28
x = -28 / -4
x = 7
Ответ: x = 7
-12 = -7 - 6 * 4x + 6 * 11
-12 = -7 - 24x + 66
-12 = 59 - 24x
24x = 59 + 12
24x = 71
x = 71 / 24
Ответ: x = 71/24
17 - 4 * 5x + 4 * 6 = -21x
17 - 20x + 24 = -21x
41 - 20x = -21x
-20x + 21x = -41
x = -41
Ответ: x = -41
4x - 8 = -5x - 2 * 8x + 2 * 4
4x - 8 = -5x - 16x + 8
4x - 8 = -21x + 8
4x + 21x = 8 + 8
25x = 16
x = 16 / 25
Ответ: x = 16/25