Question

5 pencils and 7 pens together cost rupees 50 whereas 7 pencils and 5 pens together cost rupees 46 find the cost of one pen and that of one pen​

Answer 1

Answer:

Cost of 1 pencil = Rs. 3 and Cost of 1 pen = Rs. 5

Step-by-step explanation:

Let us say that the cost of 1 pencil is x.

And, the cost of 1 pen is y.

Then, we will get two equations :-

5x + 7y = 50 or 25x + 35y = 250

7x + 5y = 46 or 49x + 35y = 322

49x + 35y - 25x - 35y = 322 - 250

24x = 72

x = 3

By putting the value of x in any equation, y = 5

So, Cost of 1 pencil = Rs. 3 and Cost of 1 pen = Rs. 5