Réponse:
[tex]2x - 7 = 9x - 2 \\ 2x - 7 - 9x = - 2 \\ - 7x - 7 = - 2 \\ - 7x = - 7 - 2 \\ - 7x = - 9 \\ x = \frac{ 9}{7} [/tex]
[tex] \frac{3x}{7} = 2 \\ x = 2 \times \frac{7}{3} \\ x = \frac{14}{3} [/tex]
[tex] - 5x + 4 = 6x + 26 \\ - 5x + 4 - 6x = 26 \\ - 11x + 4 = 26 \\ - 11x = 26 - 4 \\ - 11x = 22 \\ x = 22 \div ( - 11) \\ x = -2[/tex]
[tex] - 3 = x - 5 \\ - 3 + 5 = x \\ 2 = x[/tex]
