Răspuns:
1/2:(²⁾1-1/2):[-1/5+(-4)·(1/3+1/3:(-2))]+1/13=
1/2:1/2:[-1/5+(-4)·(1/3-1/3·1/2)]+1/13=
1:[-1/5+(-4)·(²⁾1/3-1/6)]+1/13=
1:[-1/5+(-4)·1/6]+1/13=
1:[-1/5+(-4/6)]+1/13=
1:(-³⁾1/5-⁵⁾2/3)+1/13=
1:(-3/15-10/15)+1/13=
1:(-13/15)+1/13=
-15/13+1/13=-14/13
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x/5 s-a vandut prima luna
x-x/5=4x/5 rest
4x/5·1/4=4x/20 s-a vandut a2a luna
⁴⁾x/5+4x/20+²⁰⁾3360=²⁰⁾x
4x+4x+67200=20x
67200=20x-8x
x=67200:12
x=5600 kg au fost la inceput
