Question

Martina bought 4 CDs that were each the same price. Including sales tax, she paid a total of $70.40 . Each CD had a tax of $ 1.10 . What was the price of each CD before tax?

Answer 1

`1.10 * 4 = 4.40`

`70.40 - 4.40 = 66`

`66 / 4 = 16.5`

Each CD was $16.50 before tax

Proof

`total \: cost = 16.5(4) + 1.10(4)`

`total \: cost = 66 + 4.40`

`total \: cost = 70.40`