Question

A person spent ₹564 in buting pens and pencils if cost of each pen is ₹7and each pencil is ₹3 and if the total number of things bought was 108 how many of each type did he buy​

Answer 1

Answer:

The person bought 60 pens and 48 pencils.

Step-by-step explanation:

Let the number of pens be 'x' and number of pencils be 'y'. Then,

7x + 3y = 564 ...(i)

x   +   y = 108 ...(ii)

Multiply 3 to equation (ii),

3x + 3y = 324 ...(iii)

Subtract (iii) from (i),

7x - 3x + 3y - 3y = 564 - 324

4x + 0  = 240

x = 240 / 4

x = 60

Using x = 60 in (ii)

60 + y = 108

y = 108 - 60

y = 48

∴ The person bought 60 pens and 48 pencils.