Question

The price of four notebook and the 7 pen is 11 5 rupees. the price of four notebook and two pens is 90 rupees. what is the price of a notebook and what is the price of a pen ?

Answer 1

Answer:

so ,the price of notebook is 20 rupees and pen is 5

Step-by-step explanation:

price of 4 notebook and 7 pens =115rupees

and,the price of 4 notebook and2 pens=90 rupees

let notebook be x

and pen be y

so,4x+7y=115...(i)

4x+2y=90....(ii)

by elimination method

5y=2

so, y=5

by eq.(i)

4x+7y=115

4x = 115-7y

4x =115-7(5)

4x= 115-35

4x= 80

x=20