Find the speed

Question

the sum of the speeds of two trains is 721.4 miles per hour. if the speed of the first train is 10.6 mph faster than the second train, find the speeds of each

Answer 1

v1+v2=721.4 (1)

v1=v2+10.6 (2)

So

2v2=721.4-10.6

Solve for v2 then find v1 friom (2)