document.write( "Question 988319: It took John 2.5 hours to run from Cinnaminson to Burlington Township at a constant speed. The return trip only took 2 hours because he increased her speed by 3 km/h. How fast was she running from Cinnaminson to Burlington Township? \n" ); document.write( "
Algebra.Com's Answer #608889 by macston(5194)![]() ![]() You can put this solution on YOUR website! . \n" ); document.write( "x=original speed \n" ); document.write( ". \n" ); document.write( "2.5x=2(x+3km/hr) \n" ); document.write( "2.5x=2x+6km/hr \n" ); document.write( "0.5x=6km/hr \n" ); document.write( "x=12km/hr \n" ); document.write( "ANSWER: The original speed was 12 km/hr. \n" ); document.write( ". \n" ); document.write( "CHECK: \n" ); document.write( "2.5hr(12km/hr)=2hr(12km/hr+3km/hr) \n" ); document.write( "30km=2hr(15km/hr) \n" ); document.write( "30km=30km \n" ); document.write( " |