Odpowiedź:
a = 70%b
10%a + 40%b= 25
a = 70/100b
10/100a + 40/100b = 25
a = 7/10b
1/10a + 40/100b = 25
a = 7/10b
1/10*7/10b + 40/100b = 25
a = 7/10b
7/100b + 40/100b = 25
a = 7/10b
47/100b = 25
a= 7/10b
b= 25 : 47/100
a= 7/10b
b = 25 * 100/47
a= 7/10b
b= 2500/47
a= 7/10* 2500/47
b = 53 i 9/47
a = 7/1 * 250/47
b = 53 i 9/47
a = 1750/47
b = 53 i 9/47
a = 37 i 11/47
b = 53 i 9/47
spr.
a = 70%b
L = a = 37 i 11/47
P = 70%b = 70/100 * 53 i 9/47 = 70/100 * 2500/47 = 70/1 * 25/47 =
= 1750/47 = 37 i 11/47
37 i 11/47 = 37 i 11/47
L = P
Szczegółowe wyjaśnienie:
