document.write( "Question 663056: Susan invests 2 times as much money at 5% as she does at 4%. If her total interest after 1 year is $840, how much does she have invested at each rate? \n" ); document.write( "
Algebra.Com's Answer #412601 by ReadingBoosters(3246) ![]() You can put this solution on YOUR website! x = $ at 5% \n" ); document.write( "y = $ at 4% \n" ); document.write( "y = 2x \n" ); document.write( ".05x + .04y = 840 \n" ); document.write( ".05x + .04(2x) = 840 \n" ); document.write( ".05x + .08x = 840 \n" ); document.write( ".13x = 840 \n" ); document.write( "x = $6,461.54 at 5% \n" ); document.write( "y = 2(6461.54) = $12,923.08 at 4% \n" ); document.write( "Proof \n" ); document.write( ".05(6461.54) + .04(12923.08) = \n" ); document.write( "323.08 + 516.92 = 840 \n" ); document.write( "............................... \n" ); document.write( "Delighted to help. \n" ); document.write( "-Reading Boosters \n" ); document.write( "Wanting for others what we want for ourselves. \n" ); document.write( " |