document.write( "Question 111513: Vito invested $500, part at 9% per annum, and the rest at 11% per annum. After one year, the interest earned on the 9% investment was $20 less than the interest on the 11% investment. How much did he invest at each rate? \n" ); document.write( "
Algebra.Com's Answer #81445 by elima(1433)![]() ![]() ![]() You can put this solution on YOUR website! Vito invested $500, part at 9% per annum, and the rest at 11% per annum. After one year, the interest earned on the 9% investment was $20 less than the interest on the 11% investment. How much did he invest at each rate? \n" ); document.write( "----------------------------------------------------------------- \n" ); document.write( "amount invested at each = x \n" ); document.write( ".09(500-x) \n" ); document.write( ".11x \n" ); document.write( "==================== \n" ); document.write( ".09(500-x)(1)-20=.11x \n" ); document.write( "45-.09x-20=.11x \n" ); document.write( "25=.11x+.09x \n" ); document.write( "25=.2x \n" ); document.write( "125=x \n" ); document.write( "125 = amount at 11% \n" ); document.write( "500-125=375 = amount at 9% \n" ); document.write( ":) \n" ); document.write( " |