document.write( "Question 115181: a boat travels 24 mi upstream in 3hrs. It then takes 3 hrs to go 36 mi downstream. Find speed of boat in still water and the speed of the current. (Using two unknowns, write two equations and solve.) \n" ); document.write( "
Algebra.Com's Answer #83919 by scott8148(6628)\"\" \"About 
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let b=boat and c=current ___ rate X time = distance\r
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\n" ); document.write( "\n" ); document.write( "upstream ___ (b-c)*3=24 ___ b-c=8\r
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\n" ); document.write( "\n" ); document.write( "downstream ___ (b+c)*3=36 ___ b+c=12\r
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