Odpowiedź:
a - 1 3/4 = 2 1/2
a = 2 1/2 + 1 3/4
a = 2 2/4 + 1 3/4 = 3 5/4 = 4 1/4
sprawdzenie
4 1/4 - 1 3/4 = 2 1/2
3 5/4 - 1 3/4 = 2 1/2
2 2/4 = 2 1/2
2 1/2 = 2 1/.2
L = P
