Bonjour,
3x + 2x + 1 + 5x = 10x + 1
2×5 - 2×x + 4 = 2x + 14
2×3x + 2×4 + x×3 = 9x + 8
2×x² + 3×x + x² + 3x + 2 = 3x² + 6x + 2
4×(x+5) = 4x + 20
3×(5x-3) = 15x - 9
(2x+1)×5 = 10x + 5
2×(x-1) + 8×(3x+4) = 2x- 2 + 24x + 32 = 26x + 30
(2x+1)×5+2 = 10x + 5 + 2 = 10x + 7
