To raise money for charity, Warren and his friends start the Pampered Pooch Pet Wash. The first day they are open, they forget to put up posters and only raise a little money. The next day, they hang posters all over the neighborhood and raise $55.50. In all, Warren and his friends raise $65.50 on the first two days they are open.

Which equation can you use to find the amount of money a Warren and his friends raise on the first day?

a+55.50=65.50

55.50a=65.50

a-55.50=65.50

a-65.50=55.50

a + 0 = x (where x is the amount of money raised on the first day) since they forgot to put up posters and raised only a little money on the first day.

The equation that can be used to find the amount of money Warren and his friends raise on the first day is:

a + 55.50 = 65.50