Question

at a sale, Mohit paid ₹ 129.40 for 8 files and 4 pens. If a file and a pen costs ₹ 24.50 altogether, the cost of each pen is ______​

Answer 1

Answer:

Step-by-step explanation:

Fisrtly divide24.50 by 2 to get the cost of a pen and then multiple it with 4 to get answer

Answer 2

The cost of each pen is Rs.16.65

Step-by-step explanation:

Let the cost of 1 pen be x

Let the cost of 1 file be y

We are given that  Mohit paid ₹ 129.40 for 8 files and 4 pens.

So,$8y+4x=129.40$

We are also given that a file and a pen costs ₹ 24.50 altogether

So, $x+y=24.50$

Plot the lines on the grpah

$8y+4x=129.40$---  blue line

$x+y=24.50$ --- Green line

Intersection point will give the solution

So. (x,y)=(16.65,7.85)

So, The cost of each pen is Rs.16.65

#Learn more:

Solve the following system of equation graphically : x+2y=4;4x+3y=10

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