Question

Four identical pens cost N dollars. How many would K pens cost?

Answer 1

`k\ pen = (\$Nk)/(4)`

Explanation:

Given

Cost of 4 pens = $N

Required

Determine the cost of K pens

First, we need to determine the cost of 1 pen

`4\ pen = \$N`

Divide through by 4

`(4\ pen)/(4) = (\$N)/(4)`

`1\ pen = (\$N)/(4)`

Multiply through by k to determine the cost of k pen

`k * 1\ pen = (\$N)/(4) * k`

`k\ pen = (\$Nk)/(4)`