1. (a;b)=7 => a=7x si b=7y
(x;y)=1
7x • 7y = 588
49xy=588
xy=12
=> x=1 si y=12 (si invers)
x=3 si y=4 (si invers)
asta pt ca am mentionat mai sus ca (x,y)=1
2. (a,b)=18 => a=18x si b=18y
(x,y)=1
18x + 18y = 324
18(x+y)=324
x+y=18
=> x=1 si y=18 (si invers)
x=5 si y=13 (si invers)
x=7 si y=11 (si invers)