Question

(1) 5 पेंसिल तथा 7 कलमों का कुल मूल्य 50 रु है, जबकि 7 पंसिल तथा 5 कलमों का कुल मूल्य
46 रु है। एक पेंसिल तथा एक कलम का मूल्य ज्ञात कीजिए।
51.​

Answer 1

Answer:

The cost of 1 pen will Rs5 and Pencil will rs3.

explanation is there

Step-by-step explanation:

Let the cost of Pencil be x and pen be y

=> 5x + 7y = 50

=> 5x. = 50 - 7y

=> x. = 50-7y/5. - (i)

Again,

=> 7x +5y. = 46

=> 7x. = 46 -5y

=> x. =46 -5y /7. -(ii)

From equation (i) and (ii) ,

=> 50- 7y /5 = 46 -5y /7

=> 7(50-7y) =5(46-5y)

=> 350-49y = 230 -25y

=> 49y-25y = 350-230

=> 24y. = 120

=>. y. = 5

Now, Putting the value of y in equation (i),

=> 5x+ 35 = 50

=> x = 3

So, the cost of one pen is rs5 and cost of one pencil is rs3.

I hope you like this answer .

Merry Christmas to you ⛄