x - wiek Magdy
x + 5 - wiek Kasi
x - 2 - wiek Zosi
Każda z dziewczyn ma:
Odpowiedź:
k - kasia m - magda z - zosia
k = m + 5
z = m - 2
m + 5 + m + m - 2 = 15 * 3
3m + 3 = 45
3m = 42
m = 14
k = 14 + 5 = 19
z = m - 2 = 14 - 2 = 12
Magda - 14
Kasia 19
Zosia 12
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x - wiek Magdy
x + 5 - wiek Kasi
x - 2 - wiek Zosi
Każda z dziewczyn ma:
Odpowiedź:
k - kasia m - magda z - zosia
k = m + 5
z = m - 2
m + 5 + m + m - 2 = 15 * 3
3m + 3 = 45
3m = 42
m = 14
k = 14 + 5 = 19
z = m - 2 = 14 - 2 = 12
Magda - 14
Kasia 19
Zosia 12