Odpowiedzi

2009-12-07T15:55:51+01:00
A + b = 57
0,8a + 0,75b = 44

-4a - 4b = -228
4a + 3,75b = 220
+ -----------------------
-0,25b = -8

b = 32
a + 32 = 57

b = 32
a = 25