Question

Mindy and Troy ate total of 9 pieces of the wedding cake. Mindy ate 3 pieces and Troy ate 1/4 of the total cake. Write an equation to determine how many pieces of cakes (c) were in total.

Answer 1

I. x + y = 9

II. x = 3

III. y/c = 1/4 --> y = 1/4*c

II and III in I

3 + 1/4*c = 9 --> c = 24