Question

Grant took $27.75 to the movies last friday. each ticket costs g dollars. write an expression to represent the amount of money grant had after he bought 3 tickets.

Answer 1

To represent how much money Grant will have remaining after he buys 3 tickets, you would think of subtracting g, the price of one ticket 3 times.  This could be represented by subtracting  groups of g as well.

27.75 - g - g - g or $27.75 - 3g