document.write( "Question 1206050: A person is kayaking on a river. His overall speed is 3.1 ​mile(s) per hour against the current and 7.7 ​mile(s) per hour with the current. \r
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Algebra.Com's Answer #843237 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
If choose c for the speed of the current and r for person's kayak speed in absence of the current then:
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\n" ); document.write( "\n" ); document.write( "That system is perfectly ready for using Elimination Method to find r and c.
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