document.write( "Question 346448: Elizabeth visits her friend Andrew and then returns home by the same route. She always walks 2km/h when going uphill, 6km/h when going downhill and 3km/h when on level ground. If her total walking time is 6 hours, then what is the total distance she walks in km? \n" ); document.write( "
Algebra.Com's Answer #248026 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! distance / rate = time\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "a = distance going uphill, returning downhill \n" ); document.write( "b = distance going and returning level \n" ); document.write( "c = distance going downhill, returning uphill\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "a/2 + b/3 + c/6 + c/2 + b/3 + a/6 = 6\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "3a + 2b + c + 3c + 2b + a = 36\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "4(a + b + c) = 36 \n" ); document.write( " |