Question

The price of 5 notebooks and 4 pens is 190 rupees. The price of 10 notebooks and 7 pens is 379 rupees. what is the price of a notebook. What is the price of a Pen?​

Answer 1

Answer:

The price of one pen is 1 rupee

Step-by-step explanation:

Let,

The cost of 1 notebook=X

The cost of 1 pen=Y

According to the problem,

5X+4Y=190-------1

10X+7Y=379------2

By solving 1 & 2

We get,

X=37.2

Y=1

Answer 2

Answer:

Step-by-step explanation:

let the cost of one notebook = x

let the cost of one pen = y

according to the question :

5x + 4y = 190 ----(1)

10x + 7y = 379----(2)

multiplying eqn (2) by 5 it becomes: 50x + 35y = 1895 ---(3)

multiplying eqn (1) by 10 it becomes: 50x + 40y =  1900 ---(4)

subtracting eqn (4) and eqn (3 it becomes :

5y = 5

y = 1

substitute 'y' value in eqn (1)

5x + 4(1) = 190

5x + 4 = 190

5x = 190 - 4

5x = 186

x = 186/5

x = 37.2

SO THE COST OF ONE NOTEBOOK IS ₹37.2 AND THAT OF PEN IS ₹1