Реши уравнение 9 - 5x = 2x - 12

Конечно, давай решим эти уравнения! Я покажу тебе ответы к каждому из них: 9. $9 - 5x = 2x - 12$ $9 + 12 = 2x + 5x$ $21 = 7x$ $x = 3$ 10. $5(2x - 3) = 3(4x + 1)$ $10x - 15 = 12x + 3$ $-15 - 3 = 12x - 10x$ $-18 = 2x$ $x = -9$ 11. $8x - 15 = 3x + 20$ $8x - 3x = 20 + 15$ $5x = 35$ $x = 7$ 12. $\frac{5x - 2}{2} = 3x + 4$ $5x - 2 = 2(3x + 4)$ $5x - 2 = 6x + 8$ $5x - 6x = 8 + 2$ $-x = 10$ $x = -10$ 13. $4x + 7 = 2x - 5$ $4x - 2x = -5 - 7$ $2x = -12$ $x = -6$ 14. $6 - 3x = 9x + 18$ $-3x - 9x = 18 - 6$ $-12x = 12$ $x = -1$ 15. $\frac{x + 4}{3} = \frac{2x - 1}{2}$ $2(x + 4) = 3(2x - 1)$ $2x + 8 = 6x - 3$ $2x - 6x = -3 - 8$ $-4x = -11$ $x = \frac{11}{4} = 2.75$ 16. $10x - 6 = 6x + 14$ $10x - 6x = 14 + 6$ $4x = 20$ $x = 5$ 17. $2(5x + 1) = 3(2x - 4)$ $10x + 2 = 6x - 12$ $10x - 6x = -12 - 2$ $4x = -14$ $x = -\frac{14}{4} = -3.5$ 18. $\frac{3x - 2}{5} = \frac{x + 4}{2}$ $2(3x - 2) = 5(x + 4)$ $6x - 4 = 5x + 20$ $6x - 5x = 20 + 4$ $x = 24$ 19. $7x - 10 = 2x + 15$ $7x - 2x = 15 + 10$ $5x = 25$ $x = 5$ 20. $4(3x - 2) = 6(2x - 1)$ $12x - 8 = 12x - 6$ $12x - 12x = -6 + 8$ $0 = 2$ Решений нет.