profit
Asked by | 12th Feb, 2009, 09:30: PM
Expert Answer:
let no of books is x and each has price y so we have xy = 80 ....(1) and for second case (x+4)(y-1) = 80
solving we get y = 5 and x = 16
Answered by | 13th Feb, 2009, 12:21: AM
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