Answer:
2/3
Step-by-step explanation:
2(y+1) =4(5)y + 1-15
2y+2=20y+1-15-2
18y=12
divide both sides by 18
y=2/3
Since there are two cars, each car, then, drove 104/2 = 52 miles. But one car is traveling 8 miles per hour faster.