document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1199505>Question 1199505</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A riverboat travelling with the current can go 60 km in 3 hours, on the return trip against the current it took 4 hours to travel the 60 km. Which of the following would represent a linear system that could be used to determine the speed of the riverboat and the current where x is the speed of the riverboat and y is the speed of the current?\r<BR>\n" );
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document.write( "The downstream speed is x+y; the upstream speed is x-y.  So one possible system of equations (distance = rate * time) is<br><BR>\n" );
document.write( "3(x+y)=60<BR>\n" );
document.write( "4(x-y)=60<br><BR>\n" );
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