document.write( "Question 512822: A woman invested 4 times as much at 4% as she did at 7%. The total amount of interest she earns in 1 year from both accounts is $2,070. How much did she invest at each rate?
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Algebra.Com's Answer #342755 by mananth(16946)![]() ![]() You can put this solution on YOUR website! 7.00% per annum ------------- x \n" ); document.write( " 4.00% per annum ------------ y 4 x \n" ); document.write( " \n" ); document.write( " Interest----- $2,070.00 \n" ); document.write( " \n" ); document.write( "7.00% x + 4.00% * 4 x = $2,070.00 \n" ); document.write( "0.07 x + 0.04 * 4 x = $2,070.00 \n" ); document.write( "0.07 x + 0.16 x = $2,070.00 \n" ); document.write( "0.23 x = $2,070.00 \n" ); document.write( "/ 0.23 \n" ); document.write( "x= $9,000.00 @ 7% \n" ); document.write( "4 x = $36,000.00 @4% \n" ); document.write( " \n" ); document.write( " CHECK \n" ); document.write( " $630.00 + $1,440.00 = $2,070.00\r \n" ); document.write( "\n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " \n" ); document.write( " |