document.write( "Question 1098039: two cars left the same point at the same time and travel in opposite directions. The faster car travels 12 miles per hour faster than the other. If after 6 hours the cars are 648 kilometres apart, what is the speed of each car? \n" ); document.write( "
Algebra.Com's Answer #712444 by ikleyn(52790)\"\" \"About 
You can put this solution on YOUR website!
.
\n" ); document.write( "
\r\n" );
document.write( "Let x be the speed (the rate) of the slower car, in miles per hour.\r\n" );
document.write( "\r\n" );
document.write( "Then the speed of the faster car is (x+12) mph.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The equation is\r\n" );
document.write( "\r\n" );
document.write( "6x + 6*(x+12) = 648   ====>\r\n" );
document.write( "\r\n" );
document.write( "6x + 6x + 72 = 648  ====>  12x = 648 - 72 = 576  ====>  x = \"576%2F12\" = 48.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Answer.  The speed of the slower car was 48 mph.  The speed of the faster car was 48 + 12 = 60 mph.\r\n" );
document.write( "
\r
\n" ); document.write( "\n" ); document.write( "Solved.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "---------------
\n" ); document.write( "See the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems \r
\n" ); document.write( "\n" ); document.write( "    - Travel and Distance problems for two bodies moving in opposite directions \r
\n" ); document.write( "\n" ); document.write( "in this site.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );