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Five out of seven x = fifteen out of nineteen equation
﹙5／7﹚X=15／19
X=﹙15／19﹚×﹙7／5﹚
X=3／133
6 out of 7-x = 5 out of 12
6/7-x=5/12
x=6/7-5/12=(72-35)/84=37/84
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