Sagot :
Réponse :
K = -11
L = 32
M = 127
N = 18
Explications étape par étape :
K = - 6 - (12-7)
K = - 6 - 5
K = - 11
L = (12 - 7 + 3) x 4
L = (5 + 3) x 4
L = 8 x 4
L = 32
M = - 8 x (4 - 9) x 3 + 7
M = - 8 x (-5) x 3 + 7
M = 40 x 3 + 7
M = 120 + 7
M = 127
N = 420 / (3 - 5 x 8 + 7) + 6
N = 420 / (3 - 45 + 7) + 6
N = 420 / (-42 + 7) + 6
N = 420 / 35 + 6
N = 12 + 6
N = 18