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a+b+c=369. a=b:3
b=c×2

Răspuns :

Anacaiscorpion
a=b:3----b=3a
b=cx2     3a=c x2     c=3a:2
a+b+c=369
a+3a+3a/2=369(cred ca e 396)
4a+3a/2=396
8a+3a=792
11a=792
a=792:11
a=72
b=3x72=216
c=72:2=38
verif:72+216+38=396

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