Question

The price of 5 pens and 4 pencils is 70 rupees . The price of 3 pens and 7 pencils is 65 ruppes.
What is the price of a pen

Answer 1

Answer:

10rupees

Step-by-step explanation:

let pen price be rupees x and

let the pencil price be rupees y

5x+ 4y= 70

3x+ 7y= 65

Multiply the first equation by 7

35x+28y=490

Multiply the second equation by 5

12x+28y=260

solving them we get 23x=230which gives x is 10 rupees

hence the price of a pen is 10 rupees.