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Răspuns :

c=11b

a=b/2

(a+b+c)/3=29+1/6

Inlocuim pe a si c:(b/2+b+11b)/3=29+1/6

(b/2+12b)/3=29+1/6

(b/2+24b/2)/3=29+1/6

(25b/2)/3=29+1/6

25b/6=29+1/6

Inmultim cu 6

25b=174+1

25b=175

b=7

a=b/2=7/2=3+1/2

c=11b=77