Using a debit card or credit card is faster than 1) writing a check 2)going to the atm 3)buying stamps

For a field trip to the zoo, 4 students rode in cars and the rest filled nine busess. how many students were in each bus if 472 students were on the trip

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

Don't know how to find x given these segment lengths