Răspuns :
a+b=13
13:(a-b)=2 r3
13:2=(a-b) r3
(13-3):2=a-b
10:2=a-b
a-b=5
a=b+5 ; a>b => a>5
a=6=>b=1; 6+1≠13
a=7=>b=2; 7+2≠13
a=8=>b=3; 8+3≠13
a=9=>b=4; 9+4=13
R: Numerele sunt 9 si 4
a+b=13
13:(a-b)=2 r3
13:2=(a-b) r3
(13-3):2=a-b
10:2=a-b
a-b=5
a=b+5 ; a>b => a>5
a=6=>b=1; 6+1≠13
a=7=>b=2; 7+2≠13
a=8=>b=3; 8+3≠13
a=9=>b=4; 9+4=13
R: Numerele sunt 9 si 4