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ZaineaRobert
a fost răspuns

{a,b,c} i.p {5,10,15}
a+b+c=110
a=?,b=?,c=?

Răspuns :

5a=10b=15c=k
5a=k⇒   a=k/5
10b=k⇒  b=k/10
15c=k⇒  c=k/15
k/5+k/10+k/15=110
(6k+3k+2k)/30=110
11k=110·30
k=(110·30)/11=300
a=k/5=300/5=60
b=k/10=300/10=30
c=k/15=300/15=20
60+30+20=110

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