
Zoe K. answered 01/05/21
MIT Grad For Math Tutoring and Test Prep
Hey Erie.
In order to find the price of each DVD, you must find the subtotal not including tax. To do this, subtract the tax from the total, or $85.74-$5.04. The subtotal without tax is $80.70.
Because each of the 6 DVDs are the same price, divide this subtotal without tax by 6. This should give you $13.45, the price of each DVD.
The equation for this is 6x+5.04 = 85.74, where x is the price of each DVD.