Question

Aperson spent564 rupees in buying pens and pencil if cost of each pen is 7 rupees and each pencil is3 rupees and if the total number of things bought was108,how many of each type did he buy​

Answer 1

Answer:

pens=60

pencil=48

Step-by-step explanation:

Let the number of pens be x.

⇒  Then, number of pencils =108−x

⇒  Cost of pens =7x

⇒  Cost of pencils =3(108−x)

According to the question,

7x+3(108−x)=564

7x+324−3x=564

4x+324=564

4x=564−324

4x=240

∴   x=4240=60

⇒  Number of pencils =108−60=48

∴  The number of pens bought are 60 and pencil bought are 48. 

Answer 2

Answer:

x=no.of pen

y=no. of pencil

x+y=108;

7x+3y=664

solve and get x=85 and y=23