Question

jo tick kia hu wo ek bhi kr do pls .

anyone can solve my problem ..​

Answer 1

Answer:

cost of pen ₹10

cost of a box of pencil ₹15

Step-by-step explanation:

Let the cost of pen be ₹x

and the cost of box of pencil be ₹y

According to the question we get,

4x+4y=100

3x-y=15

with help of elimination method we get,

4x+12x+4y-4y=100+60

16x=160

x=10         -  1

on substituting we get ,

3x-y=15

3*10-y=15  (x=10)

30-15=y

15=y

So. the cost of pen is ₹10

and the cost of a box of pencil is ₹15