Help me please I would really appreciate it​

Which of these choices show a pair of equivalent expressions?

What is the solution of log2  (3x  -  7)  =  3? 4 5

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.