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  • Utilizator Brainly
2014-02-26T21:21:21+02:00
A+b+c=90
a/5=b/12=c/13=k ⇒ a=5k, b=12k, c=13k ⇒ 5k+12k+13k=30k=90, k=3 ⇒
a=15, b=36, c=39
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