Question

if the cost of two pen and three books is rupees 69 and the cost of one book is rupees 15. Then the difference in the cost of each book and pen is

Answer 1

Answer:

Step-by-step explanation:

let,

the cost of pen -x

and the cost of book-y

ATQ

2x +3y=69

2x+3*15=69

2x=69-45

2x=24

x=12

Answer 2

Let the cost of each pen is x

And the cost of one book is y.

Then according to the question

2x+3y=69

But it is given that the value of one book is rupees 15

Therefore, Putting the value of x we get.

2x+3*15=69

2x+45=69

2x=69-45

2x=24

x=12.