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10 x y 2 xy 4 15 x y 5 xy u003d 2 by cross multiplication
10 x y 2 xy 4 15 x y 5 xy u003d 2 by cross multiplication pictures 5
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10 x y 2 xy 4 15 x y 5
10 x y 2 xy 4 15 x y 5 xy u003d 2 by cross multiplication
