document.write( "Question 754857: please help to solve this word problem\r
\n" ); document.write( "\n" ); document.write( "when a car travel at steady speed of v(km/h) on the main road, it covers a distance of s(km) in two hours. if the same car travels at a steady speed of 2v(km/h) it cover (s+5)km in two hours. find the value of speed \n" ); document.write( "
Algebra.Com's Answer #459521 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Write a distance equation for each statememet
\n" ); document.write( "dist = speed * time
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\n" ); document.write( "when a car travel at steady speed of v(km/h) on the main road,
\n" ); document.write( " it covers a distance of s(km) in two hours.
\n" ); document.write( "2v = s
\n" ); document.write( "or
\n" ); document.write( "2v - s = 0
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\n" ); document.write( "if the same car travels at a steady speed of 2v(km/h) it cover
\n" ); document.write( " (s+5)km in two hours.
\n" ); document.write( "2*(2v) = (s+5)
\n" ); document.write( "Rearrange and use elimination with the 1st equation
\n" ); document.write( "4v - s = 5
\n" ); document.write( "2v - s = 0
\n" ); document.write( "---------------subtraction eliminates s, find v
\n" ); document.write( "2v = 5
\n" ); document.write( "v = 5/2
\n" ); document.write( "v = 2.5 km/hr is the original speed, 5 km/hr is the final speed
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\n" ); document.write( "Check this by finding the distance (s)
\n" ); document.write( "2(2.5) = 5 km
\n" ); document.write( "2(5) = 10 which is s+5\r
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