SOLUTION: A boat leaves New Orleans and travels upstream on the Mississippi River for 4 hours. The return trip takes only 2.8 hours because the boat travels 3 miles per hour faster downstrea

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Question 990365: A boat leaves New Orleans and travels upstream on the Mississippi River for 4 hours. The return trip takes only 2.8 hours because the boat travels 3 miles per hour faster downstream due to the current. How far does the boat travel upstream?
Answer by farohw(175) About Me  (Show Source):
You can put this solution on YOUR website!

4x = 2.8(x + 3)

4x = 2.8x + 8.4

4x - 2.8x = 8.4

1.2x = 8.4

1.2x/1.2 = 8.4/1.2

x = 7 miles upstream