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2014-04-26T11:39:13+03:00
A+b+c=345
a+25/100*a=  b+50/100*b= c+ 20/100*c
a+a/4= b+b/2 +c +c/5
a+a/4=b+b/2  aducem la acelasi numitor
4a+a=4b+2b
5a=6b
b=5a/6

a+a/4=c+ c/5  aducem la acelasi numitor
20a+5a=20c+4c
25a=24c
c=25a/24

a+5a/6+  25a/24=345  aducem la acelasi numitor
24a+20a+25a=8280
69a=8280
a=120
b=5*120/6=  5*20=100
c=25*120/24=25*5=125

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