Réponse :
Explications étape par étape
Bonsoir
indiquez les resultats simplifies dans le tableau ci-dessous utiliser les etapes de calcules
a= -4x7/16x15/-35
A = -4 x 7/16 x -15/35
A = 4/16 x 7 x 15/35
A = 4/(4 x 4) x 7 x (5 x 3)/(5 x 7)
A = 1/4 x 7 x 3/7
A = 1/4 x 3 x 7/7
A = 3/4
b=(1/-5+5/4):-7/50
B = (-1/5 + 5/4) x (-50/7)
B = [(-1 x 4)/(5 x 4) + (5 x 5)/(4 x 5)] x (-50/7)
B = (-4/20 + 25/20) x (-50/7)
B = 21/20 x (-50/7)
B = -50/20 x 21/7
B = (-5 x 10)/(2 x 10) x (3 x 7)/7
B = -5/2 x 3
B = -15/2
c=5/4+-15/8x-2/-3
C = 5/4 - 15/8 x 2/3
C = 5/4 - 15/3 x 2/8
C = 5/4 - (3 x 5)/3 x 2/(2 x 4)
C = 5/4 - 5 x 1/4
C = 5/4 - 5/4
C = 0
d=-23/21:(2/7-8/5)
D = -23/21 : [(2 x 5)/(7 x 5) - (8 x 7)/(5 x 7)]
D = -23/21 : (10/35 - 56/35)
D = -23/21 : (-46/35)
D = -23/21 x -35/46
D = 35/21 x 23/46
D = (7 x 5)/(7 x 3) x 23/(23 x 2)
D = 5/3 x 1/2
D = 5/6
e=(1-1/16)x(-3/2 - -7/10)
E = (16/16 - 1/16) x (-3/2 + 7/10)
E = 15/16 x [(-3 x 5)/(5 x 2) + 7/10]
E = 15/16 x (-15/10 + 7/10)
E = 15/16 x (-8/10)
E = 15/17 x (-2 x 4)/(2 x 5)
E = 15/17 x -4/5
E = 15/5 x -4/17
E = (5 x 3)/5 x (-4/17)
E = 3 x (-4/7)
E = -12/7
f=A+E/C
F = 3/4 + (-12/7) / 0 => division par 0 impossible donc pas de solution.