Mathematics, 04.02.2021 05:10, wolfgirl4762

A trucker drove 9 hours to deliver a shipment of lumber. Returning home with a lighter load, the trucker averaged 8 miles per hour faster than on the earlier trip. After 7 hours, the trucker was only 60 miles from the starting point. The equation 9 s equals 7 open parentheses s plus 8 close parentheses plus 60 models the situation, where s represents the speed traveling to the delivery site. What is the value of s, in miles per hour?

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