document.write( "Question 1187022: During a trip of 385 miles, Fred averaged 15 miles per hour in the cities and 70 miles per hour on the highways. If the trip took a total of 7 hours, how much time did Fred spend driving in the cities?
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Algebra.Com's Answer #817956 by josgarithmetic(39630)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "                  SPEED            TIME         DISTANCE\r\n" );
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document.write( "Cities            15                x          15x\r\n" );
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document.write( "Highways          70              7-x          70(7-x)\r\n" );
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document.write( "totals                            7               385\r\n" );
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\n" ); document.write( "Total distance is equation in one variable.
\n" ); document.write( "\"15x%2B70%287-x%29=385\"
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