Joanna is driving 185 miles to visit her family. She drives 68 miles in the morning, stops for lunch, and then drives the rest of the distance. How many miles did she drive after lunch?
Use the variable m to represent the number of miles she drove after lunch.
Which equation represents this situation and its solution?
A. m + 68 = 185; m = 117
B. 185m = 68; m = 17
C. 68m = 185; m = 17
D. m + 185 = 68; m = 117