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a fost răspuns

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Răspuns :

3a=4b=5c=k
a=k/3
b=k/4
c=k/5
(k/3 + k/4 + k/5)/3 = 94
k/3 + k/4 + k/5 = 282
Numitor comun 60
20k+15k+12k=282•60
47k=282•60
k=(282•60)/47
k=360
a=360/3=120
b=360/4=90
c=360/5=72
120+90+72=282