document.write( "Question 1013784: need to write an equation and solve\r
\n" ); document.write( "\n" ); document.write( "Julia Ling drove the 200 km to Richmond at a speed 10 km/h faster than usual. If she completed the trip in one hour less than usual, find her usual driving speed. \n" ); document.write( "

Algebra.Com's Answer #630079 by ikleyn(52794) $\"\"$ $\"About$

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\n" ); document.write( "Julia Ling drove the 200 km to Richmond at a speed 10 km/h faster than usual. If she completed the trip in one hour less than usual, find her usual driving speed.
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document.write( "Your equation is\r\n" );
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document.write( "200/u - 200/(u+10) = 1.\r\n" );
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document.write( "where u is the usual speed in .\r\n" );
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document.write( "To solve it, multiply both sides by u*(u+1) to get off denominators.\r\n" );
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document.write( "Then simplify and solve.\r\n" );
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document.write( "Answer. 40 .\r\n" );
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