For members a video store charges a membership fee of $21 and then$2.50 for each movie rental. For non-members they charge $4 for each movie rental. How many movies do you need to rent for members and non-members to pay the same amount? 1 Answer Dec 2, 2016 Answer: Both of these will be the same when Customers have rented 14 videos. Explanation: Let's call the number of videos we are looking for $v$. For non-member these videos would cost: $4 xx v

For members these videos would cost the membership fee plus the $2.50 per video or: #$21 + ($2.50 xx v). To find when these are equal you equate them and solve as follows: $4 \times v = 21 + \left(2.5 \times v\right)$$\left(4 \times v\right) - \left(2.5 \times v\right) = 21 + \left(2.5 \times v\right) - \left(2.5 \times v\right)$$1.5 \times v = 21$$\frac{1.5 \times v}{1.5} = \frac{21}{1.5}$$v = 14\$