Question

A local Computer City sells batteries ($3) and small boxes of pens ($5). In August, total sales were $960. Customers bought 5 times as many batteries as boxes of pens. How many of each did Computer City sell?

Answer 1

The number of batteries sold was 240 and the number of small boxes of pens sold was 48

Explanation:

Let

x -----> the number of batteries sold

y ----> the number of small boxes of pens sold

we know that

`3x+5y=960` -----> equation A

`x=5y` ----> equation B

substitute equation B in equation A

`3(5y)+5y=960\\15y+5y=960\\20y=960\\y=48\ boxes\ of \ pens`

Find the value of x

`x=5(48)=240\ batteries`

therefore

The number of batteries sold was 240 and the number of small boxes of pens sold was 48