J’ai besoin d’aide svp

Réponse :

a- x=11025

b- x=4.46

c- x=5.625

c- x=10.91

Explications étape par étape:

a) x/5 = 9/4

4x = 45

x = 45/4

x = 11.25

b) 7/x =11/7

11x = 49

x = 49/11

x = 4.45

c) 9/8 = x/5

8x = 45

x = 45/8

x = 5.625

d) 11/12 = 10/x

11x = 120

x = 120/11

x = 10.90