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2014-09-20T15:37:25+03:00
Xy + yz + zx = 66
10x + y + 10y + z + 10z + x = 66
11x + 11y + 11z = 66
11 ( x + y + z ) = 66
x + y + z = 66 : 11 = 6
Nr sunt : 150 , 105 , 114 , 141 , 411 , 321 , 312 , 213 , 231 , 132 , 123 
24 4 24
2014-09-20T15:40:38+03:00
Xy+yz+zx=66
10x+y+10y+z+10z+x=66
10(x+y+z)+(x+y+z)=66
11(x+y+z)=66
x+y+z=6


6 4 6