Bonjour,

2,4 - 2,1x = 2,4 - 2,1x   (on ne peut rien changer)

4x × 2x × 3x = 24x³

12x + 12x = 24x

2 × 5x = 10x

6 × x × 4 = 24x

2x × 2x = 4x²

x × 24x = 24x²

4x × 6x = 24x²

4 × 6x = 24x

4 + 3 × 2x = 4 + 6x

2 × (3x + 2) = 6x + 4

6x + 4x = 10x