Odpowiedź :
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
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
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
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
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
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