C = S - 24 => S - C = 24
S = 7×C
M = C -2
C |___|
S |___|___|___|___|___|___|___|
M |___|-2
7 segmente egale - 1 segment egal = 6 segmente egale = 24
24 : 6 = 4 (un segment egal)
C = 4 ani ( Cornelia)
S = 7×4 = 28 ani (sora)
M = 4 - 2 = 2 ani (Marius)
4 + 28 + 2 = 34 ani (in total in prezent)
34 + 3 × 3 = 34 + 9 = 43 ani (peste 3 ani)