Odpowiedzi

2009-11-04T19:20:50+01:00
A - Ania
b - Basia
c - Celina
c =70
a =b+40%*b
a =c-40%*c

a =b+40%*b
a =70-28

a =42

42 =b+4/10b
42 =14/10b
14b =420
b =30
ania -42 basia 30 celina - 70
2 5 2
2009-11-04T19:24:47+01:00
Celina - 70 autografów
Ania - 42 autografów

100% - 70
40% - x
x= 40*70= 2800:100=28
70 - 28= 42
Basia - 30 autografów

100% - X
140% - 42
x= 100*42=4200:140=30
1 3 1
2009-11-04T19:38:22+01:00
Ania
60% 70
----- * =42
100

Ania-42 autografy

Basia:
140% * x =
1,4 * x = 42
x= 42 420
----- =------- = 30
1.4 14

odp.Ania - 42
Basia-30
------ - kreska ułamkowa
2 4 2