Mara = Andrei : 2
Irina = Mara + 36
Teodor = Irina - 82 ; 100 p
Teodor = Irina - 82 => Irina - 82= Teodor
Irina - 82 = 100
Irina = 100 + 82
Irina = 182
Irina = Mara + 36 => 182 = Mara + 36
Mara + 36 = 182
Mara = 182 - 36
Mara = 146
Mara = Andrei : 2 => 146 = Andrei : 2
Andrei : 2 = 146
Andrei = 146 × 2
Andrei = 292