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Mathematics 21 Online
OpenStudy (anonymous):

17. Your local gas stations are having a price war. During the past 7 days they have lowered the price of regular gas by $0.02 each day. Find the total change in the price of gas. a) Choose and label a variable for this situation. b) Write an equation using the variable that would answer the question. c) Solve your equation, and check your answer. d) Use the solution to write a sentence answer to the question in the word problem.

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