A+I+M+G = 77-(6×4) = 77-24 = 53 ani
A = I:3 => I = 3×A
M = A:4-1 =>A:4 = M+1 => A = (M+1)×4= 4M +4
G =5×A:2
A = 4 segmente +4
I = 12 segmente+12
M = 1 segment
G = 10 segmente +10
avem 27 segmente egale +4+12+10
53-26 = 27
27:27 = 1 (un segment)
A = 4×1+4 = 8 ani( Alin)
I = 12×1+12= 24 ani (Ion)
M = 1 an (Marian)
G = 10×1+10 = 20 ani (George)