345,45zł - cena końcowa
x - cena początkowa
105% = 1,05
70% = 0,7
x*1,05*0,7 = 345,45
x*0,735 = 345,45
x = 470zł
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345,45zł - cena końcowa
x - cena początkowa
105% = 1,05
70% = 0,7
x*1,05*0,7 = 345,45
x*0,735 = 345,45
x = 470zł