Răspuns :
a+b+c=890
a=1/3 din b= 1/3 *b= b/3
b=1/2 din c= 1/2 *c= c/2
a= c/2/3= c/2 *1/3= c/6
c/6+c/2 +c=890 aducem la acelasi numitor
c+3c+6c=890*6
10c=890*6
c=890*6/10
c=89*6
c=534
b=534/2=267
a=534/6=89
a=1/3 din b= 1/3 *b= b/3
b=1/2 din c= 1/2 *c= c/2
a= c/2/3= c/2 *1/3= c/6
c/6+c/2 +c=890 aducem la acelasi numitor
c+3c+6c=890*6
10c=890*6
c=890*6/10
c=89*6
c=534
b=534/2=267
a=534/6=89
a+b+c=890
a=1/3*b=b/3
b=1/2*c=c/2
c/6+c/2+c=890
c+3c+6c=890*6=5340
10c=5340
c=5340:10=534
b=534/2=267
a=267/3=89
a=1/3*b=b/3
b=1/2*c=c/2
c/6+c/2+c=890
c+3c+6c=890*6=5340
10c=5340
c=5340:10=534
b=534/2=267
a=267/3=89