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x=1995 zł
2.
75%-50g
100%-Xg
x=5000/75
x=66,6g
3.V₁=a³
V₁=4*4*4
V₁=64 dm³=64 l(litry)
V₂=abc
V₂=2*8*4
V₂=64 dm³=64 l
Oba akwaria mają taką samą objętość.