Bonjour,

Exercice 1

1+2 = 3

15/3 = 5

Ratio 1: 5kg

ratio2 : 5*2 => 10kg

2+3 = 5

30/5 = 6

ratio2: 6*2 => 12 €

Ratio 3: 6*3 => 18€

Exercice 2

1)

2+3 = 5

10 = 5*2

15 = 5*3

=> oui