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y=druga liczba
x+66⅔%y=53
y+33⅓%x=48
x+⅔y=53
y+⅓x=48
x=53-⅔y
y+⅔(53-⅔y)=48
y+¹⁰⁶/₃-⁴/₉y=48
⁵/₉y=48-35⅓
y=12⅔:⁵/₉
y=22,8
x=53-⅔×22,8=37,8
odp. szukane liczby to 37,8 i 22,8