the solution is in the above picture.
Answer:
I need how much is it per one mile <em>or</em> how much does is cost every 5 mins at least
Yes, they are proportional. if you divide the second fraction down to simplest form, you get 7/12, which is equal to the first fraction.
Step 1. (5+4-2)x(-2)
Step 2. (7)x(-2)
Step 3. -14