document.write( "Question 439539: Walt made an extra $9000 last year from a part-time job. He invested part of the money at a 9% annual rate of interest, and the rest at an 8% annual rate of interest. At the end of the year, he made a total of $770 in interest. How much was invested at 8%? \n" ); document.write( "
Algebra.Com's Answer #316506 by jorel1380(3719)![]() ![]() You can put this solution on YOUR website! m+n=9000 \n" ); document.write( ".09m+.08n=770 \n" ); document.write( "9m+8n=77000 \n" ); document.write( "8m+8n=72000 \n" ); document.write( "m=5000 \n" ); document.write( "n=4000 \n" ); document.write( "$4000 was invested at 8%.. \n" ); document.write( " |