I zi+II zi + III zi = 61 t
III = 2×I + 18
III = II + 25 => II = III - 25
I |____|
II |____|____|+18 (- 25)
III |____|____|+18
avem 5 segmente egale +18 +18 -25 = 61
61 - (18+18) = 61-36 = 25
25 + 25 = 50
50 : 5 = 10 ( un segment egal)
I = 10
II = 2×10 +18 -25 = 20+18-25 = 13
III = 2×10+18 = 20+18 = 38
Verificare:
10+13+38 = 61
10 tone rosii in prima zi
13 tone rosii in a 2-a zi
38 tone rosii in a 3-a zi