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loan76
@loan76
January 2021
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Bonjour, quel est le nombre qui , multiplié par 7 tiers donne :
a2 ?
b.-5 ?
c 1 tier
d 28 neufieme .
Désolé je suis sur pc donc je ne peux pas faire les fractions
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calinizou
Verified answer
Bonjour,
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
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loan76
Merci :)
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Verified answer
Bonjour,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