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Caroline drove 50 miles to her mother's house at an average speed of 40 miles per hour, and she drove back on the same route at an average speed of 60 miles per hour. What was her average speed for the entire trip, in miles per hour?
what is x when:3(x+456)+5(56x-45)=0
what is x when:
3x+1368+280x-225=0283x+1143=0283x=-1143x=-1143/283therefore x= -4.04
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