Bonjour
I = 4 * (2x - 7) + 6 * (- 4x + 6)
I = 8x - 28 - 24x + 36
I = - 16x + 8
I = 8 (- 2x + 1)
J = 5 * (2/3x - 1/10) - 3 * (5/6x - 1/4)
J = 10/3x - 5/10 - 15/6x + 3/4
J = 200/60x - 30/60 - 150/60x + 45/60
J = 50/60x + 15/60
J = 5/6x + 1/4
K = 3 * (- 2x + 4) - 7 * (- 3x - 4)
K = - 6x + 12 + 21x + 28
K = 15x + 40
K = 5 (3x + 8)
L = - 1/2 * (3x - 2) + 4/5 * (- 2x + 15)
L = - 3/2x + 2/2 - 8/5x + 60/5
L = - 3/2x + 1 - 8/5x + 12
L = - 15/10x - 16/10x + 13
L = - 31/10x + 13
M = - 2 * (- 3x + 7) - 7 * (2x - 8)
M = 6x - 14 - 14x + 56
M = - 8x + 42
M = - 2 (4x - 21)
N = 1/4 * (- 8/3x + 8/7) - 3/8 * (- 16/9x + 4/21)
N = - 8/12x + 8/28 + 48/72x - 12/168
N = - 48/72x + 48/72x + 48/168 - 12/168
N = 36/168
N = 3/14
