Ali bought 4cds that were each the same price including sales tax he paid a total of $ 50.40 of that total 2.80 was tax what was the price of each cd before tax.

50.4-2.8=47.6

47.6/4=11.9

Each CD, before tax, cost $11.90.

As you can see above, I subtracted the sales tax from the total price first. Since each CD cost the same amount and there are 4 CDs in all, you can divide the price of all 4 CDs by 4 to find the price of 1 CD.

Hope this helps!

Let x = $ of cds

We can use the equation 4x +2.80 = 50.40 to represent the grand total

Now we can just solve this equation to find the value of x

4x + 2.80 = 50.40

-2.80 -2.80

4x = 47.60

/4 /4

x= 11.90

Each CD costed $11.90 before tax.

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