15. A person spent * 564 in buying pens andpencils if cost of each pen

1.	15. A person spent * 564 in buying pens andpencils if cost of each pen is 7 and eachpencil is 3 and if the total number of thingsbought was 108, how many of each type did he buy?
Answer» ANSWER: Pen=40 Pencil =68 Step-by-step EXPLANATION: Let a=pen & b= pencil From condition 1) = cost of pens and pencils are 564 and cont of pencil & pen respectively are 3&7 So, 7a+3b=564 From 2nd condition) =number of pen & pencil is 108 So a+b=324 After SOLVING equation We GET a=40 & b=68

15. A person spent * 564 in buying pens andpencils if cost of each pen is 7 and eachpencil is 3 and if the total number of thingsbought was 108, how many of each type did he buy?

Answer»

Pen=40

Pencil =68

Step-by-step EXPLANATION:

Let a=pen & b= pencil

From condition 1) = cost of pens and pencils are 564 and cont of pencil & pen respectively are 3&7

So, 7a+3b=564

From 2nd condition) =number of pen & pencil is 108

So a+b=324

After SOLVING equation

We GET a=40 & b=68