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Mathematics, 15.02.2021 22:00 StupidFatChipmunk

A repairman charges an inspection fee plus $30 per hour. A customer with a coupon for 40% off the inspection fee pays $84 for a 2-hour repair. How many hours are worked when a customer pays $130 without a coupon?

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A repairman charges an inspection fee plus $30 per hour. A customer with a coupon for 40% off the in...
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