The equation x + y = z relates the whole numbers x, y, and z. How does z compare to ?
If it helps, consider an example where you substitute 3 for x, 5 for y, and 8 for z.

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.

55, 90 and 35 (when you add it, it should be 180)