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OpenStudy (anonymous):
Two friends go to a restaurant and order identical dinners. Additionally, one of the friends orders a cup of coffee that costs $0.50. If their total bill, excluding tax and tip, is $21.50, what is the price of a single dinner?
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OpenStudy (anonymous):
2x+0.50=21.50
OpenStudy (rulnick):
... which gives x=10.5, or $10.50 for a single dinner
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