Răspuns :
a-b =34
a =35+2b
35+2b - b =34
b =34-35
b = -1
a =35+2b
a =35+2* (-1) =35-2 = 33
verif ; 33 -(-1) =33+1 =34
a =35+2b
35+2b - b =34
b =34-35
b = -1
a =35+2b
a =35+2* (-1) =35-2 = 33
verif ; 33 -(-1) =33+1 =34