Question

the price of a book is 5 ruppess more than the price of a pen. the price of a pencil is 3 rupees less than the price of pen the total price 3 book,5pen and 4 pencil is 123 rupees what is the price of each​

Answer 1

Answer:

Price of pen=Rs.10

price of book=Rs.15

price of pencil=Rs.7

Step-by-step explanation:

Let the price of pen be x. Then price of the book is x+5 and price of the pencil is x-3.

As Per Question,

3(x+5)+5*x+4(x-3)=123

3x+5x+4x+15-12=123

12x-3=123

12x=120

x=120/12=10

Therefore, price of pen =10, book=10+5=15 and pencil =10-3=7

Answer 2

Answer:

The price of book is $ 5+X.

The price of pencil is $ x-3.

And if price of pen is $ x

So The total price of 3 books, 5 pens, and 4 pencils is 123 rupees. So,

5×(3+x)+5×x+4×(x-4)=123.

15+5x+5x+4x-16=123

14x-1=123

14x=124

x=$ 8.57

Therefore price of book is 3+x=3+8.57=11.57$.