Does this look right?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?

Can someone me find the original price? the discount is 5% and the sale price is $68.40