Bonjour,
Explications étape par étape :
appelons n le nombre recherché :
a) n × 7/3 = 2 ⇒ n = 2 ÷ 7/3 = 2 × 3/7 = 6/7
b) n × 7/3 = -5 ⇒ n = (-5) ÷ 7/3 = (-5) × 3/7 = -15/7
c) n × 7/3 = 1/3 ⇒ n = 1/3 ÷ 7/3 = 1/3 × 3/7 = 3/21 = 1/7
d) n × 7/3 = 28/9 ⇒ n = 28/9 ÷ 7/3 = 4/3
