Bonsoir
A = -9/5 + 7/5
A = -2/5
b = -2,62/27 - 14,5/27
B = -17,12/27
B = -1712/2700
B = -(4 x 428)/(675 x 4)
B = -428/675
c = 12/25 - (-17/25) - 133/25
C = 12/25 + 17/25 - 133/25
C = 29/25 - 133/25
C = 104/25
d = 4,5 - 7/8
D = 45/10 - 7/8
D = (9 x 5)/(2 x 5) - 7/8
D = 9/2 - 7/8
D = (9 x 4)/(2 x 4) - 7/8
D = 36/8 - 7/8
D = 29/8
e = -5 - 6/5
E = -25/5 - 6/5
E = -31/5
F = -5/21 - 7/3
F = -5/21 - (7 x 7)/(3 x 7)
F = -5/21 - 49/21
F = -54/21
F = (-3 x 18)/(3 x 7)
F = -18/7
G = -2/7 + 3/14
G = (-2 x 2)/(7 x 2) + 3/14
G = -4/14 + 3/14
G = -1/14
