document.write( "Question 456875: Equal amounts are invested at 6%, 7%, and 9% annual interest. If the three investments yield a total of $880 annual interest, find the total investment. \n" ); document.write( "
Algebra.Com's Answer #313511 by mananth(16946)![]() ![]() You can put this solution on YOUR website! 6% ----x \n" ); document.write( "7%-----x \n" ); document.write( "9%-----y\r \n" ); document.write( "\n" ); document.write( "880 interest\r \n" ); document.write( "\n" ); document.write( "6x+7x+9x=880*100 \n" ); document.write( "22x=88000 \n" ); document.write( "x=88000/22 \n" ); document.write( "=4000 \n" ); document.write( "$ 4000 *3=$12,000 \n" ); document.write( " |