Odpowiedzi

2009-12-07T12:58:03+01:00
750-25% 15%-x
750:5=150 - 5%
150*3=450 --- 15%
2009-12-07T13:02:33+01:00
100% - x
25% - 750

25x = 75 000 /:25
x = 3 000

100% = 3 000
___________________________
100% - 3 000
15% - x

100x - 45 000 /:100
x - 450