Odpowiedzi

2010-02-27T21:05:34+01:00
2010-02-27T21:06:56+01:00
19+23+27+90+x=559
159+x=559
x=559-159
x=400
2010-02-27T22:58:07+01:00
19+23+27=69
559-69=490
490:2=245

19+23+27+245+245=559

x=245