Odpowiedź:
a)14-70%
x-100%
1400=70x
x=20
b) 13-15%
15x=1300
x=260/3
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Odpowiedź:
a)14-70%
x-100%
1400=70x
x=20
b) 13-15%
x-100%
15x=1300
x=260/3