document.write( "Question 866295: a woman cycles for x hours at 12km/h and y hours at 18km/h. altogether she cycles 78km in 5 hours. find x and y? \n" ); document.write( "
Algebra.Com's Answer #522166 by mananth(16946)\"\" \"About 
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Total time\r
\n" ); document.write( "\n" ); document.write( "x+y=5\r
\n" ); document.write( "\n" ); document.write( "Total distance\r
\n" ); document.write( "\n" ); document.write( "12x+18y=78\r
\n" ); document.write( "\n" ); document.write( "1.00 x + 1.00 y = 5.00 .............1
\n" ); document.write( "Total value
\n" ); document.write( "12.00 x + 18.00 y = 78.00 .............2
\n" ); document.write( "Eliminate y
\n" ); document.write( "multiply (1)by -18.00
\n" ); document.write( "Multiply (2) by 1.00
\n" ); document.write( "-18.00 x -18.00 y = -90.00
\n" ); document.write( "12.00 x + 18.00 y = 78.00
\n" ); document.write( "Add the two equations
\n" ); document.write( "-6.00 x = -12.00
\n" ); document.write( "/ -6.00
\n" ); document.write( "x = 2.00
\n" ); document.write( "plug value of x in (1)
\n" ); document.write( "1.00 x + 1.00 y = 5.00
\n" ); document.write( "2.00 + y = 5.00
\n" ); document.write( " y = 5.00 -2.00
\n" ); document.write( " y = 3.00
\n" ); document.write( " y = 3.00
\n" ); document.write( "x= 2.00
\n" ); document.write( "y= 3.00
\n" ); document.write( "m.ananth@hotmail.ca
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