Number 28 help

Question

2 cars leave the same place at the same time and travel in opposite directions.

at the end of three hours they are 354 miles apart.

if one travels 14 miles an hour faster than the other how many miles an hour does each travel?

Answer 1

d=r*t

354=r*3+(r+14)*3

354=3r+3r+42

354-42=6r

312=6r

r=312/6

r=52 mph

r+14=66 mph