Solve multi-step word problems, including estimation.  Select the equation that can be used to solve a word problem.  


Scott got up early this morning to hike into the mountains and watch the sun rise.
The trail goes uphill for a while, climbing 32 meters in elevation. After the uphill portion, the trail slopes steeply downhill, falling 19 meters in elevation. Finally, Scott has to climb 29 more vertical meters to the ledge where he will watch the sun rise.
Let m stand for how many meters higher Scott is at the end of this hike than he was at the beginning.
Choose the best equation to represent this problem:
Please choose from one of the following options.