Odpowiedzi

2010-02-01T18:59:13+01:00
3y = 2x/(-0.5)
2y = x+5

-1,5y= -x
2y = x+5
0,5y = 5 kg
1y (lis) = 10 kg
3 * 10 = 2x
30 = 2x
x=15 kg (borsuk)
odp. Borsuk waży 15 kg.
2010-02-01T20:40:11+01:00
B - waga borsuka
l - waga lisa

2b = 3l /:2
2l = b+5

b = 1½l
2l = b+5

b = 1½ l
2l = 1½l+5

b = 1½l
2l-1½l = 5

b = 1½l
½l = 5 /*2

b = 1½l
l = 10

b = 1½*10
l = 10

b = 15
l = 10

Borsuk waży 15 kilogramów.