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a=5,40
b=2/3a
b=3,60
4,05+5,40=9,45
1,35 x 3 = 4, 05 - gruszki
4,05 : 3 = 1,35
1,35 x 2 = 2,70 - jabłka
2,70 + 4,05 = 6,75
Odp. Za te zakupy zapłaciłem 6,75.