Odpowiedzi

2009-12-10T16:27:27+01:00
X+y= 13
10x+y= 10y +x+27

x= 13-y

9(13-y)=9y + 27

117 -9y=9y +27
18y=90
y = 5
x= 13-5 = 8

wiec ta loczba to 10x+y = 85