Question

Marą purchased a cell

phone for $30. This amount
Includes a 6% sales tax. What
was the cost of the item
before tax?

Answer 1

Answer: $28.30✔️

Explanation:

Let C = cost before tax

Cell phone costs = C + C·6% = $30

C(1 + 0.06) = $30

C = $30/1.06 = $28.30

Answer: $28.30✔️

Verify

Cell phone after tax = $28.30 + $28.30·6/100 = $28.30 + $1.70 = $30✔️

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