A rideshare app charges $2 per trip plus $0.4 per mile. A competitor charges $1 for the first 6 miles plus $0.5 per mile for every additional mile. For what length trip would the two services charge the same amount?

A. 10 miles

B. 18 miles

C. 20 miles

D. 40 miles

Can you craft an algebraic equation to solve this directly – or is plugging in the answers the way to go?