Arestaurant sells only two desserts, pie and cake. a piece of pie cost $4.a piece of cake cost $5.the restaurant sells 100 desserts, which cost a total of $473.how many pieces of pie did they sell ( needed fast)

Let p and c be the pieces of pie and cake respectively.

We have p+ c= 100 (because the total number of pieces of pie and cake is 100).

On the other hand, we have $4p+ $5c= $473
or 4p+ 5c= 473

p+c=100
4p+5c=473

Solving the set of equations above, we have: p= 27, c=73.

They sold 27 pieces of pie~