document.write( "Question 56970: Sam earned 1155 in interest on a total investment 15000 this past year, if part of the money was invested at 6% and the remainder at 9% how much was invested at 6% \n" ); document.write( "
Algebra.Com's Answer #38758 by Earlsdon(6294)![]() ![]() ![]() You can put this solution on YOUR website! Let $x = the amount invested at 6%, then the remainder of ($15000 - $x) = the amount invested at 9%. Changing the percents to their decimal equivalents (6% = 0.06 and 9% = 0.09), you can write the equation for this situation:\r \n" ); document.write( "\n" ); document.write( "0.06x + 0.09(15000-x) = 1155 Simplify and solve for x. \n" ); document.write( "0.06x + 1350 - 0.09x = 1155 \n" ); document.write( "-0.03x + 1350 = 1155 Subtract 1350 from both sides of the equation. \n" ); document.write( "-0.03x = -195 Divide both sides by -0.03 \n" ); document.write( "x = $6500\r \n" ); document.write( "\n" ); document.write( "The amount invested at 6% was $6500 \n" ); document.write( " \n" ); document.write( " |