You buy a container of cat liter $13.75 and and a bag of cat food for X dollars. The total purchase is $20.80, which includes 4% sales tax. Write and solve an equation to find out the cost of the car food

I got $6.22 for the cat food. I'm sure you don't need to know this, but the 4% sales tax is $0.82.

In this question it is important to note down all the important information's that are mentioned in the question.

Cost of a container of cat liter = $13.75

Cost of a bag of cat food = X dollars

Total amount of money required to purchase the items = $20.80

Percentage of sales tax that had to be given = 4%

Then

Amount of sales tax given = (4/100) * 20.8 dollars

= 20.8/25 dollars

= 0.83 dollars

Then the total purchase price for the two items = 20.80 - 0.83 dollars

= 19.97 dollars

Now we can easily find the cost of the cat food by subtracting the cost of the liter from the total purchase amount.

Then

Cost of the cat food = 19.97 - 13.75 dollars

= 6.22 dollars

So the cost of the bag of cat food is $6.22