Bonsoir,
1) 2- 4(2x - 5) = 8x - (2x - 9)
• 2 - 4 × 2x - 4 × (-5) = 8x - 2x + 9
• 2 - 8x + 20 = 8x - 2x + 9
• -8x + 22 = 6x + 9
• -8x + 22 + 8x - 9 = 6x + 8 + 8x - 9
• 22 - 9 = 6x + 8x
• 14x = 13
• x = 13/14 ✅
2) 5 + 3x - (2 + 2x) - 14 = 4x + 9
• 5 + 3x - 2 - 2x - 14 = 4x + 9
• x + 5 - 16 = 4x + 9
• x - 11 = 4x + 9
• -11 - 9 = 4x - x
• 3x = -20
• x = -20/3 ✅
Bonne soirée !