1) 3x+5=5x 2) -6x-8-4x 3) 4+5x-3x-9 4) -6-2x-2x+7 5) 5(x-3)-4 6) 4(x-2)-10 7) 2(x-1)-5 8) 3(x+2)=-3 9) 10(x+3)--7 10)7(x+2) = 7

Вариант 3. Решаем уравнения.

Пошаговое решение:

1. \(3x + 5 = 5x\) \(-2x = -5\) \(x = \frac{5}{2} = 2.5\)
2. \(-6x - 8 = 4x\) \(-10x = 8\) \(x = -\frac{8}{10} = -0.8\)
3. \(4 + 5x = 3x - 9\) \(2x = -13\) \(x = -\frac{13}{2} = -6.5\)
4. \(-6 - 2x = -2x + 7\) \(-2x + 2x = 7 + 6\) \(0 = 13\) Нет решений.
5. \(5(x - 3) = 4\) \(5x - 15 = 4\) \(5x = 19\) \(x = \frac{19}{5} = 3.8\)
6. \(4(x - 2) = 10\) \(4x - 8 = 10\) \(4x = 18\) \(x = \frac{18}{4} = 4.5\)
7. \(2(x - 1) = 5\) \(2x - 2 = 5\) \(2x = 7\) \(x = \frac{7}{2} = 3.5\)
8. \(3(x + 2) = -3\) \(3x + 6 = -3\) \(3x = -9\) \(x = -3\)
9. \(10(x + 3) = 7\) \(10x + 30 = 7\) \(10x = -23\) \(x = -\frac{23}{10} = -2.3\)
10. \(7(x + 2) = 7\) \(7x + 14 = 7\) \(7x = -7\) \(x = -1\)

Ответы: 1) 2.5, 2) -0.8, 3) -6.5, 4) нет решений, 5) 3.8, 6) 4.5, 7) 3.5, 8) -3, 9) -2.3, 10) -1