Réponse :
A = -6/5 ou -1,2
B = -9/53
C = 35/33
Explications étape par étape
Bonjour
A=24/5+ -6/5divisé par 1/5
A = 24/5 - 6/5 x 5
A = 24/5 - 6
A = 24/5 - (6 x 5)/5
A = 24/5 - 30/5
A = -6/5
A = -1,2
B= -1/2 divisé par (5/2+4/9)
B = -1/2 / (5/2 + 4/9)
B = -1/2 / [(5 x 9)/(2 x 9) + (4 x 2)/(9 x 2)]
B = -1/2 / (45/18 + 8/18)
B = -1/2 / (53/18)
B = -1/2 x 18/53
B = -9/53
C=(2/3 -4)divisé par( -8/7 -2)
C = [2/3 - (4 x 3)/3] / [-8/7 - (2 x 7)/7]
C = (2/3 - 12/3) / (-8/7 - 14/7)
C = (-10/3) / (-22/7)
C = -10/3 x -7/22
C = 10/22 x 7/3
C = (2 x 5)/(2 x 11) x 7/3
C = 5/11 x 7/3
C = 35/33
