Конечно, давай решим уравнения из твоего списка!
1. $7 - 2x = 9 - 3x$
$3x - 2x = 9 - 7$
$x = 2$
**Ответ: x = 2**
2. $11x = 6 + 5(2x - 1)$
$11x = 6 + 10x - 5$
$11x - 10x = 1$
$x = 1$
**Ответ: x = 1**
3. $6(2x - 3) - 3x = 2x - 4$
$12x - 18 - 3x = 2x - 4$
$9x - 18 = 2x - 4$
$9x - 2x = 18 - 4$
$7x = 14$
$x = 2$
**Ответ: x = 2**
4. $4(3x + 5) - 5(4x - 3) = 3$
$12x + 20 - 20x + 15 = 3$
$-8x + 35 = 3$
$-8x = -32$
$x = 4$
**Ответ: x = 4**
5. $5x - 3(4x - 1) = 7 - 2(7x + 2)$
$5x - 12x + 3 = 7 - 14x - 4$
$-7x + 3 = 3 - 14x$
$14x - 7x = 3 - 3$
$7x = 0$
$x = 0$
**Ответ: x = 0**
6. $-5,6(x - 3) + 2,1x = -3,5x + 10$
$-5,6x + 16,8 + 2,1x = -3,5x + 10$
$-3,5x + 16,8 = -3,5x + 10$
$-3,5x + 3,5x = 10 - 16,8$
$0 = -6,8$ (Решений нет)
**Ответ: нет решений**
7. $\frac{x}{3} + \frac{x}{5} = 8$
$\frac{5x + 3x}{15} = 8$
$8x = 120$
$x = 15$
**Ответ: x = 15**
8. $\frac{5}{6}x - \frac{2}{15}x = 21$
$\frac{25x - 4x}{30} = 21$
$21x = 630$
$x = 30$
**Ответ: x = 30**
9. $3x - 5 = \frac{3x + 17}{2}$
$6x - 10 = 3x + 17$
$6x - 3x = 17 + 10$
$3x = 27$
$x = 9$
**Ответ: x = 9**
10. $\frac{3x + 7}{10} = \frac{7x - 2}{16}$
$16(3x + 7) = 10(7x - 2)$
$48x + 112 = 70x - 20$
$70x - 48x = 112 + 20$
$22x = 132$
$x = 6$
**Ответ: x = 6**
11. $\frac{2x - 5}{5} - \frac{3x - 2}{4} = \frac{5 - 2x}{12}$
$\frac{4(2x - 5) - 5(3x - 2)}{20} = \frac{5 - 2x}{12}$
$\frac{8x - 20 - 15x + 10}{20} = \frac{5 - 2x}{12}$
$\frac{-7x - 10}{20} = \frac{5 - 2x}{12}$
$12(-7x - 10) = 20(5 - 2x)$
$-84x - 120 = 100 - 40x$
$-84x + 40x = 100 + 120$
$-44x = 220$
$x = -5$
**Ответ: x = -5**
12. $\frac{2x - 5}{3} - \frac{5x + 4}{2} = \frac{1 - 5x}{4} + \frac{5x + 2}{6}$
$\frac{2(2x - 5) - 3(5x + 4)}{6} = \frac{3(1 - 5x) + 2(5x + 2)}{12}$
$\frac{4x - 10 - 15x - 12}{6} = \frac{3 - 15x + 10x + 4}{12}$
$\frac{-11x - 22}{6} = \frac{-5x + 7}{12}$
$12(-11x - 22) = 6(-5x + 7)$
$-132x - 264 = -30x + 42$
$-132x + 30x = 42 + 264$
$-102x = 306$
$x = -3$
**Ответ: x = -3**
13. $(x - 7)(5x + 8) = 0$
$x - 7 = 0$ или $5x + 8 = 0$
$x = 7$ или $5x = -8$
$x = 7$ или $x = -\frac{8}{5} = -1,6$
**Ответ: x = 7, x = -1,6**
14. $x(2x - 5)(3x + 7) = 0$
$x = 0$ или $2x - 5 = 0$ или $3x + 7 = 0$
$x = 0$ или $2x = 5$ или $3x = -7$
$x = 0$ или $x = \frac{5}{2} = 2,5$ или $x = -\frac{7}{3} \approx -2,33$
**Ответ: x = 0, x = 2,5, x = -2,33**
15. $(x^2 - 5x) + 5 - x = 0$
$x^2 - 6x + 5 = 0$
$x^2 - 6x + 5 = 0$
По теореме Виета:
$x_1 + x_2 = 6$
$x_1 * x_2 = 5$
$x_1 = 1, x_2 = 5$
**Ответ: x = 1, x = 5**
16. $3x^2 - 18x + (6 - x) = 0$
$3x^2 - 19x + 6 = 0$
$D = (-19)^2 - 4 * 3 * 6 = 361 - 72 = 289$
$x_1 = \frac{19 + \sqrt{289}}{2 * 3} = \frac{19 + 17}{6} = \frac{36}{6} = 6$
$x_2 = \frac{19 - \sqrt{289}}{2 * 3} = \frac{19 - 17}{6} = \frac{2}{6} = \frac{1}{3}$
**Ответ: x = 6, x = 1/3**
17. $81x^2 - 9 = 0$
$81x^2 = 9$
$x^2 = \frac{9}{81} = \frac{1}{9}$
$x = \pm \sqrt{\frac{1}{9}} = \pm \frac{1}{3}$
**Ответ: x = 1/3, x = -1/3**
18. $16 - 4y^2 = 0$
$4y^2 = 16$
$y^2 = 4$
$y = \pm \sqrt{4} = \pm 2$
**Ответ: y = 2, y = -2**
19. $(x + 4)^2 - (2x + 6)^2 = 0$
$(x + 4)^2 = (2x + 6)^2$
$x + 4 = \pm (2x + 6)$
$x + 4 = 2x + 6$ или $x + 4 = -2x - 6$
$-x = 2$ или $3x = -10$
$x = -2$ или $x = -\frac{10}{3}$
**Ответ: x = -2, x = -10/3**
20. $x^2 = 16$
$x = \pm \sqrt{16} = \pm 4$
**Ответ: x = 4, x = -4**
21. $x^2 = 24$
$x = \pm \sqrt{24} = \pm 2\sqrt{6}$
**Ответ: x = 2√6, x = -2√6**
22. $(x + 3)^2 = 64$
$x + 3 = \pm \sqrt{64} = \pm 8$
$x = -3 \pm 8$
$x_1 = -3 + 8 = 5$
$x_2 = -3 - 8 = -11$
**Ответ: x = 5, x = -11**
23. $(x - 4)^2 = 6$
$x - 4 = \pm \sqrt{6}$
$x = 4 \pm \sqrt{6}$
**Ответ: x = 4 + √6, x = 4 - √6**
24. $\sqrt{x} = 6$
$x = 6^2 = 36$
**Ответ: x = 36**
25. $\sqrt{x - 8} = 0$
$x - 8 = 0$
$x = 8$
**Ответ: x = 8**
26. $2\sqrt{x} - 9 = 0$
$2\sqrt{x} = 9$
$\sqrt{x} = \frac{9}{2}$
$x = (\frac{9}{2})^2 = \frac{81}{4} = 20,25$
**Ответ: x = 20,25**
27. $\sqrt{6x - 3} = 5$
$6x - 3 = 25$
$6x = 28$
$x = \frac{28}{6} = \frac{14}{3}$
**Ответ: x = 14/3**
28. $\sqrt{6x - 3} = 2$
$6x - 3 = 4$
$6x = 7$
$x = \frac{7}{6}$
**Ответ: x = 7/6**
29. $\sqrt{3} + \sqrt{x} = 5$
$\sqrt{x} = 5 - \sqrt{3}$
$x = (5 - \sqrt{3})^2 = 25 - 10\sqrt{3} + 3 = 28 - 10\sqrt{3}$
**Ответ: x = 28 - 10√3**
30. $\sqrt{2x + 3} - \sqrt{x - 8} = 0$
$\sqrt{2x + 3} = \sqrt{x - 8}$
$2x + 3 = x - 8$
$x = -11$
Проверка: $\sqrt{2(-11) + 3} - \sqrt{-11 - 8} = \sqrt{-19} - \sqrt{-19}$ (не имеет смысла, так как под корнем отрицательное число)
**Ответ: нет решений**