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Stiind ca 3a/2b=5/4 ,3b/5c=6/7 si a+b+c=1672 aflati a,b si c.
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Răspuns :

Renatemambouko
3a/2b=5/4    12a=10b   6a=5b   b=6a/5
3b/5c=6/7    21b=30c   7b=10c  c=7b/10 = (7*6a/5)/10=42a/50=21a/25
a+b+c=1672
a+6a/5+21a/25=1672
25a+30a+21a=41800
76a=41800
a=550
b=6*550/5=660
c=21*550/25=462

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