A, b and c are different prime numbers. work out a set of values for a, b and c so that a + b = 2c

The only way I can see to work this out is long hand writing out all prime numbers multiply them by 2 and looking for prime number interferes therefore = 3+7=10

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.