Question

Dam had $23 to spend on three pens. After buying them he had $11. How much did each pen cost.

Answer 1

Given that Dam had $23 to spend on three pens.

After buying them he had $11.

Let x be the cost of each pen.

The given statement can be written as follows.

`23-3x=11`

Subtracting 23 from both sides, we get

`23-3x-23=11-23`

`-3x=-12`

Dividing both sides by -3, we get

`-(3x)/(-3)=-(12)/(-3)`
`x=4`

Hence the cost of each pen is $4.