Question

1. A person bought some pens and pencils for Rs. 564. If each pen cost Rs.7 and each pencil Rs.3 and the total number of pens and pencils he bought was RS. 108.find the number of each item.

Answer 1

Answer:

pencils = 75 and pens = 33

Step-by-step explanation:

let no of total pencils is x and pens y

x + y= 108

each pen costs 7rs

pencil costs 3rs

3x + 7y = 564

by multiplying first equation with 3

and substracting it from 2nd gives

3x + 7y = 564

-3x - 3y = -432

        4y = 132

y=33

x=108-33=75