0,5=5/10=1/2
0,2=2/10=1/5
0,(3)=3/9=1/3
a,b,c dp 1/2 1/5 1/3
a/1/2= b/1/5= c/1/3=k
a * 2/1= b* 5/1 = c* 3/1=k
2a=5b=3c=k
a=k/2
b=k/5
c=k/3
a+b+c=930
k/2 +k/5 +k/3 =930 aducem la acelasi numitor
15k +6k+10k= 13 950
31k=13 950
k=450
a=450/2=225
b=450/5=90
c=450/3=150
