Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Bobby needed to make some trips with his truck and had only 12 gallons of gasoline. He drives to a supermarket 5 miles away and then drives back home. Then he headed to his farm which was 6 miles away. Two miles into the journey, he turned around and drove back home to retrieve some farming tools he forgot to take earlier and drove down to the farm. If he now has exactly 2 gallons of gasoline left, at what rate in miles per gallon has his truck been consuming gasoline?


### Response:
 Il a d'abord conduit 5 miles jusqu'au supermarché, puis est revenu chez lui, pour un total de 5+5=10 miles.
Il a ensuite conduit 2 miles vers la ferme et est revenu sur ses pas, pour un total de 2+2=4 miles.
Il a enfin conduit jusqu'à la ferme, pour un total de 10+4+6=20 miles.
Il a consommé 12-2=10 gallons d'essence pour l'ensemble du trajet.
Le taux est donc de 20/10=2 miles par gallon.