September 2018 1 19 Report
1.Oblicz niewiadomy wyraz proporcji:
a) x:5=2:10
b)6 18
-- = ---
x 12
c) 7:21=x:5
d)3 0,15
--- = -----
8 x
2. Oblicz x:
a)¹₄-¹₅ x
------- = -----
¹₄+¹₅ 0,09
b) 0,25 0,15y
--------- = -------
2¹₃-1¹₄ = 260
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