Question

with RS 36 ,Roshan can either buy 4 notebooks and 10 pencils or 8 notebooks and 2 pencils . 5 pencils and 5 notebooks together will cost RS dash​

Answer 1

Answer:

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