Mathematics, 07.10.2019 02:30, richardwalker8ourhg2

Working together, shawn and hector can install a tile floor in 6 hours. it would take shawn 9 hours to do the job alone. what is the value of r, the part of the tile that hector could install in 1 hour?

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Working together, shawn and hector can install a tile floor in 6 hours. it would take shawn 9 hours...