Răspuns:
a) n = 21
b) n = 113
c) n = 281
d) n = 37
Explicație pas cu pas:
ma (n ; 129) = 75 <=>
(n+129)/2 = 75 => n+129 = 75·2 = 150 =>
n = 150-129 => n = 21
==========================
ma (n ; 129) = 121 <=>
(n+129)/2 = 121 => n+129 = 121·2 = 242 =>
n = 242-129 => n = 113
============================
ma (n ; 129) = 205 <=>
(n+129)/2 = 205 => n+129 = 205·2 = 410 =>
n = 410-129 => n = 281
============================
ma (n ; 129) = 83 <=>
(n+129)/2 = 83 => n+129 = 83·2 = 166 =>
n = 166-129 => n = 37
