Question

A bookkeeper needs to post the cost of a desk and chair into his records. The cost of the desk was five times the cost of the chair. The total cost of both the desk and chair was $720. What was the cost of the desk?

Answer 1

desk is $600

chair is $120

cost of chair x 5 = cost of desk

600 + 120 = 720

Answer 2

The cost of the desk is: $ 600

Explanation:

Let the cost of desk=$ x

and the cost of chair= $ 5x

( Since, it was given that:The cost of the desk was five times the cost of the chair )

Also, the total cost of the both the items is: $ 720

This means that:

`x+5x=720\\\\i.e.\\\\6x=720`

On dividing both side by 6 we obtain:

`x=120`

Hence, we get:

Cost of chair=$ 120

and cost of Desk= 5×120=$ 600