document.write( "Question 1060598: Write and solve an equation: in two hours, a motorboat can travel 8 miles down a river and return 4 miles back. If the river flows at 2 miles per hour, how fast can the boat travel in still water?\r
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Algebra.Com's Answer #675521 by josgarithmetic(39617)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "             SPEED         TIME       DISTANCE\r\n" );
document.write( "DOWN         r+2                        8\r\n" );
document.write( "UPRIVER      r-2                        4\r\n" );
document.write( "Total                       2\r\n" );
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document.write( "             SPEED         TIME       DISTANCE\r\n" );
document.write( "DOWN         r+2           8/(r+2)      8\r\n" );
document.write( "UPRIVER      r-2           4/(r-2)      4\r\n" );
document.write( "Total                       2\r\n" );
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