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Mathematics, 12.07.2019 15:00 nathanfletcher

Carlos shovels snow from driveways in his neighborhood. he charges $10 for each regular driveway and he charges an extra $7.50 for each large driveway that he shovels. after a snowstorm he shovels 3 fewer large driveways than regular driveways and makes $140. how many regular driveways did carlos shovel?

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