Question

the price of 2 pens and 3 notebook is 40 rupees also the price of 2 pens and 5 notebooks are 60 rupees. what is the price of a pen what is the price of a notebook ​

Answer 1

Answer:

Let the price of 1 pen =Rs. X

Let the price of 1 notebook = Rs. Y

Hence 2x +3y= 40 - (1)

And 2x + 6 y = 60 - (2)

Subtract eq (1) from eq (2 )

Then 3y = 20

Hence y = 20/3 Rs.

Put the value of y in eq (1)

Then 2x + 3×(20/3) =40

2x +20 = 40

2x = 20

x = 10 Rs

Hence the price of 1 pen is 10 Rs. and the price of 1 notebook is 20/ 3 Rs.

Answer 2

$\huge\mathrm\pink{Answer}$

Let the price of one pen be ' x'

Let the price of one notebook be 'y'

According to first condition,

2x + 3y = 40 ----> 1

According to second condition,

2x + 5y = 60 -----> 2

Subtracting 1 from 2

2x + 5y = 60

2x + 3y = 40

__________

0 + 2y = 20

y = 20/2

y = 10

Substituting y = 10 in equation 1

2x + 3y = 40

2x + 3(10) = 40

2x + 30 = 40

2x = 40 - 30

2x = 10

x = 10/2

x = 5

Therefore, the price of a pen is x = 5 and the price of notebook is y = 10 .