Alexis bought x boxes of cereal for $3 each, including tax, and paid with a $20 bill. Which expression represents the total amount of change she should receive?
Answer
A
20 – 3x
B
(3 – 20)x
C
3x – 20
D
(20 – 3)x
Explanation
The total cost of x boxes at $3 each is 3x dollars. Subtract that cost from the $20 Alexis paid: 20 − 3x. So the expression is 20 − 3x, choice A.
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