ASAP PLEASE NEED THE HELP !!

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

What is the rate for one gallon of gasoline

Why is x= 4 a solution to the proportion 14/x 56/1 6