Math
posted by Anonymous on .
Jessica purchased a bag of cat food. She feeds her cat 1 cup of cat food each day. After 7 days, she has fed her cat 2/3 of the food in the bag. How many cups of food were in the bag of cat food when Jessica bought it?

In simplest form

Let x = cups of food in bag.
7 = 2/3x
Multiply both sides by 3/2. 
10 1/2

10.5

7*2/3
Reciprocate:
7*3/2
10.5