(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)
(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)