Answer: My friend has sold 7 subscriptions more than me after 5 weeks.
Step-by-step explanation: Given that me and my friend are selling magazine subscriptions for a fundraiser. After w weeks, I have sold (3w+4) subscriptions and your friend has sold (5w+1) subscriptions.
We are to find the number of subscriptions that my friend has sold more than me after 5 weeks.
We have
the number of subscriptions sold by me after 5 weeks will be

and the number of subscriptions sold by my friend after 5 weeks will be

Therefore,

Thus, my friend has sold 7 subscriptions more than me after 5 weeks.