Dylan and sonia arw hiking different trails. if dylan hiked riverwalk and mountainview , and sonia hiked mountainveiw and pine , how many miles did each of them walk ? riverwalk=3/4 mountainview=1/2 pine=3/5

I assume that the values appearing after the equal signs for Riverwalk, Mountainview, and Pine are the distances in miles. For Dylan who hiked Riverwalk and Mountainview, the total distance covered is,
                       3/4 + 1/2 = 5/4 or 1.25 miles
For Sonia who hiked Mountainview and Pine, the distance covered is,
                      1/2 + 3/5 = 11/10 or 1.1 miles

Um I need to know the specific problem because you can do it several different ways according to the problem