Question

A person spent rupees 564 in buying pens and pencils , pens cost is 7 rupees and each pencil cost is 3 rupees and if the total no of things bought was 108, how many each type did he buy?
please give me full answer..........

Answer 1

Let the number of pens be x.
number of pencils=108-x
cost of pens=7x
cost of pencils=3(108-x)
7x+3(108-x)=564
7x+324-3x=564
4x+324=564
4x=564-324
4x=240x=240/4
x=60
Number of pens=60
Number of pencils=108-60=48

Answer 2

Answer:

Step-by-step explanation:

Pen=7rupees

Pencil=3rupees

Total items=108

Total Pens can be written as 7(x)

Total pencils can be written as 3(108-x)

7(x)+3(108-x)=564

7x+324-3x=564

4x=564-324

4x=240

Hence,x=60(total pens)

(108-x)=(108-60)

Total no.of pencils =48.