Réponse :
Bonsoir
Explications étape par étape
A = V147/V75
A = (V49 * V3)/(V25 * V3)
A = 7/5
B = 8V5 / 3V20
B = 8V5 / (3V5 * V4)
B = 8 / (3*2)
B = 8/6
B = 4/3
C = (V28/V42) * (V30/V45)
C = (V7 * V4/V7 * V6) * (V6 * V5 / V9 * V5)
C = 2/3
