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Mathematics, 06.07.2019 19:10 fansofboys

Yesterday, jim went on a bike ride. his average speed was 10 miles per hour. today, he went days, he biked for a combined total time of 9 hours. on another ride, this time averaging 12 miles per hour. in the two let x be the number of hours he biked yesterday, write an expression for the combined total number of miles he biked in the two days

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