Question

the price of a book is 5 rupees less than thrice the price of a pen.If book costs 40 rupees,what does a pen cost?​

Answer 1

Answer:

15 rupees

Step-by-step explanation:

let the cost of pen be x

since , the book is 5 rupees les than thrice of  pen

therefore,

book = 3x- 5

so if price of book is 40 rupees then

40 = 3x-5

3x= 40+ 5

3x= 45

x= 45/3

x= 15

price of the pen is 15 rupees

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Answer 2

Answer:

let the price of the pen be x rupees

then the price of the book will be (3x-5)rupees

A/Q

3x-5=40

3x=40+5

x=45/3

x=15

Hence ,the price of the pen is 15 rupees