Odpowiedzi

2009-12-17T10:35:52+01:00
1 bok = x
2 bok x+7
3 bok x+5

x+x+7+x+5=30
3x=18
x=6

1bok = 6
2bok = 13
3bok=11
1 5 1
2009-12-17T10:39:46+01:00
I bok - x
II bok - x+7
III bok - x+7-2=x+5
x+x+7+x+5=30
3x=30-5-7
3x=18
x=6 - I bok
x+7=6+7=13 - II bok
x+5=6+5=11 - III bok
1 5 1