Odpowiedzi

2009-09-14T20:04:51+02:00
{10x+y+27=10y+x
{10x+y+10y+x=99

{10x+y+27=10y+x
{10x+y+10x+y+27=99

20x+2y+27=99
20x+2y=72 /2
10x+y=36

36+27=10y+x
10y+x=63

odp. 36 i 63