Question

a shopkeeper buys a number of books for ₹80.if he had bought 4 more books for the same amount, each book would have cost ₹ 1 less.how many books did he buy?





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Answer 1

ANS =

number of books RS= 80.

BOUGHT. 4 MORE BOOKS

80-1= 79

79×4= 316 is your correct answer

Answer 2

Answer:

VarghesebijupbaxnsHelping Hand

Eq no 1:- total books purchased = x

Therefore unit price = 80/ x

Eq no 2:- 4 extra book purchased on same price = ×+4 =80

Therefore unit price = 80/(×+4)

Difference of price is Rs. 1

Hence 80/× - 80/(x-4) =1

By solving the equation

320/ (xpower2 + 4x)=0

Xpower2+4x-320=0

X(X+20) -16(X+20)=0

(X+20) (X-16)=0

X=-20, X=16

We negate negative answer

Therefore no of books brought =16

Step-by-step explanation: