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A car rental company charges $39.99 per day plus $0.20 per mile. Jill rented a car for one day and the charges were $47.39,before tax. Use m for number of miles. Write an equation. Find how many miles Jill drove.

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y = .20m + 39.99

47.39 = .20m + 39.99
Subtract 39.99 from both sides
7.40 = .20m
Divide both sides by .20
37 = m
She drove for 37 miles

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