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Hibaben
@Hibaben
May 2019
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Aidez moi SVP c est urgent
a, b et c sont des nombres rationnels
Sachant que c÷2=b÷3=a÷5
Et. a+b+c = 60
Merci d avance
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aymanemaysae
Bonjour ;
Puisque c/2 = b/3 = a/5 , alors on a :
c/2 = a/5 donc c = 2/5 a
et b/3 = a/5 donc b = 3/5 a .
On a : a + b + c = a + 2/5 a + 3/5 a = 2 a = 60 ,
donc : a = 30 , et par suite : c = 2/5 x 30 = 12 et b = 3/5 x 30 = 18 .
Conclusion : a = 30 ; b = 18 et c = 12 .
1 votes
Thanks 1
Hibaben
merci beaucoup pour ton aide
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Puisque c/2 = b/3 = a/5 , alors on a :
c/2 = a/5 donc c = 2/5 a
et b/3 = a/5 donc b = 3/5 a .
On a : a + b + c = a + 2/5 a + 3/5 a = 2 a = 60 ,
donc : a = 30 , et par suite : c = 2/5 x 30 = 12 et b = 3/5 x 30 = 18 .
Conclusion : a = 30 ; b = 18 et c = 12 .