Răspunsuri

2014-11-19T12:05:44+02:00
9x+23y+z=100x+10y+z
100x-9x+10y-23y+z-z=0
91x-13y=0
13(7x-y)=0
7x-y=0⇒ 7x=y

x poate lua valorile doar 1 si atunci avem asa
x=1
y=7
z=0,1,2,3,4,5,6,7,8,9