3(x + 8) ≥ 4(7 - x)
3x + 24 ≥ 28 - 4x
3x + 4x ≥ 28 - 24
7x ≥ 4
\[x \ge \frac{4}{7}\]
(x + 2)(x - 5) > (x + 3)(x - 4)
x² - 5x + 2x - 10 > x² - 4x + 3x - 12
x² - 3x - 10 > x² - x - 12
-3x + x > 10 - 12
-2x > -2
x < 1
\[\frac{4}{7} \le x < 1\]
(x + 3)(x - 6) ≤ (x + 2)(x + 1) + 4
x² - 6x + 3x - 18 ≤ x² + x + 2x + 2 + 4
x² - 3x - 18 ≤ x² + 3x + 6
-3x - 3x ≤ 6 + 18
-6x ≤ 24
x ≥ -4
2(6x - 1) ≥ 7(2x - 4)
12x - 2 ≥ 14x - 28
12x - 14x ≥ 2 - 28
-2x ≥ -26
x ≤ 13
-4 ≤ x ≤ 13
Ответ: \[\frac{4}{7} \le x < 1\] и \[-4 \le x \le 13\]