document.write( "Question 1118152: When travelling at (x-5) km/h, a train takes 2x hours to travel 12km. Find the speed of the train. \n" ); document.write( "

Algebra.Com's Answer #733403 by josgarithmetic(39617) $\"\"$ $\"About$

You can put this solution on YOUR website!
RT=D for R rate, T time, D distance.\r
\n" ); document.write( "\n" ); document.write( "Your example uses R=x-5, and T=2x, and D=12.\r
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\n" ); document.write( "\n" ); document.write( " $\"highlight_green%2812%2F%282x%29=x-5%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"6%2Fx=x-5\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " $\"x%5E2-5x=6\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"x%5E2-5x-6=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28x-6%29%28x%2B1%29=0\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"highlight_green%28x=6%29\"$ \r
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( "Speed was $\"highlight%281%29\"$ kilometer per hour.\r
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( "check:
\n" ); document.write( "recall, x=6.
\n" ); document.write( "-
\n" ); document.write( " $\"12%2F%282x%29=x-5\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"12%2F%282%2A6%29=6-5\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"12%2F12=1\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"1=1\"$ \r
\n" ); document.write( "\n" ); document.write( "(speed given as x-5;
\n" ); document.write( "which is evaluated as 1 ) \n" ); document.write( "

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