If a class have 32 students and 12 is girls, what is the percentage of girls

Step-by-step 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