Sagot :
EXERCICE 33 :
6x + 3x = 9x
11x - 9x = 2x
5x - 8x = - 3x
- 15x + 4x = - 11x
27x + x = 28x
- x - 7x = - 8x
EXERCICE 35 :
5x + 2x = 7x
5x - 2 = pas possible
5x² + 2x = pas possible
2x² - 5x² = - 3x²
5 + 2x² = ppas possible
5x - 2x = 3x