At 9am, Laverne started from home on a hike to a mountain 12 miles away. After reaching the mountain, he took 1 hour for lunch and then returned over the same route, arriving home at 5pm. If his average rate returning was 1 mph less that his rate going, find his rate on the return trip.
My set up:
8x + 8(x - 1) = 12
I got 24 mph but the answer is 3 mph. What did I do wrong? I guess my entire equation is wrong, right?