please help fast

Question

Diane bought 6

 CDs that were each the same price. Including sales tax, she paid a total of $75.60

. Of that total, $7.80

 was tax. What was the price of each CD before tax?

Answer 1

What was the price of each CD before tax?

Let C = the COST of each CD before tax

6C = the cost of 6 CD's before tax

6C + 7.80 = the total cost of 6 CD's and the tax

$75.60 = the total cost of 6 CD's and the tax

6C + 7.80 = 75.60

6C + 7.80 - 7.80 = 75.60 - 7.80 Subtracting 7.80 from both sides of the equation.

6C = 67.80

6C/6 = 67.80/6 Dividing both sides of equation by 6 to ISOLATE C.

C = 11.30

ANSWER: Each CD sold for $11.30 before tax.

CHECKING:

(6) ($11.30) = $67.80

$67.80 + $7.80 = $75.60

Hope this was helpful ADRIAN.