wiek obecny:
Edka --- x + 3
Ala ------ x
Ewa ---- x + 3 + 3 = x + 6
x + 3 + x + 6 = 39
2x + 9 = 39
2x = 39 - 9
2x = 30
x = 15lat -------- odpwoiedx
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wiek obecny:
Edka --- x + 3
Ala ------ x
Ewa ---- x + 3 + 3 = x + 6
x + 3 + x + 6 = 39
2x + 9 = 39
2x = 39 - 9
2x = 30
x = 15lat -------- odpwoiedx