document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=992159>Question 992159</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Two trains leave the station at the same time, one heading west and the other east. The westbound train travels 12 mph faster than the eastbound train. If the two trains are 800 miles apart after 5 hours, what is the rate of the westbound train? </SPAN>\n" );
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document.write( "let x be the speed of the westbound train in mph.\r<BR>\n" );
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document.write( "The the speed of the other train is x-12 mph.\r<BR>\n" );
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document.write( "The distance between the trains increases by [x + (x-12)] = 2x-12 miles each hour.\r<BR>\n" );
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document.write( "The equation to find x is \r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=800%2F%282x-12%29 ALIGN=MIDDLE  ALT=\"800%2F%282x-12%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5 ALIGN=MIDDLE  ALT=\"5\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Simplify and solve it:\r<BR>\n" );
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document.write( "800 = 5*(2x-12),\r<BR>\n" );
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document.write( "800 = 10 x - 60,\r<BR>\n" );
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document.write( "10x = 860,\r<BR>\n" );
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document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=860%2F10 ALIGN=MIDDLE  ALT=\"860%2F10\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 86 mph.\r<BR>\n" );
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document.write( "<U>Answer</U>. the speed of the westbound train is 86 mph.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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