Odpowiedź:
Franek - x
Basia - x - 5
x + x - 5 = 17
2x = 17 + 5
2x = 22
x = 11
11 - 5 = 6
Odp. Franek ma 11 lat, a Basia ma 6 lat
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Odpowiedź:
Franek - x
Basia - x - 5
x + x - 5 = 17
2x = 17 + 5
2x = 22
x = 11
11 - 5 = 6
Odp. Franek ma 11 lat, a Basia ma 6 lat