document.write( "Question 417289: Super unleaded gasoline costs 9 cents more per gallon than regular unleaded gasoline. A service station buys 3,000 gallons of super unleaded and 2,000 gallons of regular unleaded for $8,919. What is the cost per gallon of each kind of gasoline? \n" ); document.write( "
Algebra.Com's Answer #292159 by mananth(16946) You can put this solution on YOUR website! unleaded = x /gallon \n" ); document.write( "super ---- (x+9)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "2000x+3000(x+9)=8919\r \n" ); document.write( "\n" ); document.write( "2000x+3000x+27000=891900 \n" ); document.write( "5000x=891900-27000 \n" ); document.write( "5000x=864900 \n" ); document.write( "x=172.98 cents/gallon \n" ); document.write( "x= $1.73/gallon unleaded \n" ); document.write( "super = $1.82 / gallon \n" ); document.write( " \n" ); document.write( " |