document.write( "Question 584998: Rusty has a boat goes 12 mi. an hour. Find the current speed of the river if he can go 3 mi. upstream in the same time as he goes 5 mi. downstream. \n" ); document.write( "
Algebra.Com's Answer #373044 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
r*t=d
\n" ); document.write( "(12-c)*t=3
\n" ); document.write( "(12+c)*t=5
\n" ); document.write( "c=3
\n" ); document.write( "t=1/3
\n" ); document.write( "
\n" ); document.write( "
\n" );