Question

The price of 3 pen and 4 note book is 110 rupees; and the price of 3 pen and 2 note book is 70 rupees. What is the price of a pen ?And the price of a note book?​

Answer 1

Answer:

Pen=10

Pen=10Note book=20

Step-by-step explanation:

Solution:

3 Pen +4 Notebook =110 rupees

Multiply by 5,

15 Pen +20 Notebook =550 rupees

7 Pen +5 Notebooks =170 rupees

Multiply by 4,

28 Pen +20 Notebook =680 rupees

15 Pen +20 Notebook =550 rupees

Equating and solving for Pen,

Cancelling notebook,

13 Pen =130 Hence,

Pen =10 rupees

Substituting,

3(10)+4 Notebook =110

4 Notebook =110−30 Hence,

Notebook =20 rupees