M + A + C + N = 1 140 timbre
N = A + C + 40
C = A -80 => A = C +80
M = 3×A
M |___|___|___|+240
A |___|+80
C |___|
N |___|___|+40+80
avem 7 segmente egale +240 + 80 + 40 + 80 = 1 140
1 140 - (240+80+40+80) = 1 140 - 440 = 700
700 : 7 = 100 ( un segment egal)
M = 3×100 + 240 = 300+240 = 540
A = 100+80 = 180
C = 100
N = 2×100+40+80 = 200+120 = 320
Verificare:
540 + 180 + 100 + 320 = 1 140
540 timbre are Mircea
180 timbre are Andrei
100 timbre are Catalin
320 timbre are Narcisa