What is the solution set for 7x – 3 = 18, given the replacement set {0, 1,2,3,4} ? O
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total bill before any discounts $13.
she is a student, so she gets 20% off.
she brought an item of clothing, so she gets 5% off.
so she's really getting 20% + 5% off, namely 25% off her bill.