Answer:

Explanation:
Total amount of shampoo = 60 ounces
Amount of shampoo used in 1 wash = 1 ounce
Amount of shampoo used in x washes = x ounces
So, Remaining amount of shampoo = 60-x
We are given that 24 ounces will remain in the bottle
So, equation becomes :

Hence equation can be used to find x, the number of washes after which 24 ounces will remain in the bottle is
