document.write( "Question 208811: The question from the text book is this \"Bill invested three times as much money at 9% as at 7.5%. If he wanted his interest at the end of the year to be $1725, what amount of money should he inves a 7.5%?\" \n" ); document.write( "

Algebra.Com's Answer #157927 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

You can put this solution on YOUR website!
\"Bill invested three times as much money at 9% as at 7.5%.
\n" ); document.write( "If he wanted his interest at the end of the year to be $1725,
\n" ); document.write( "what amount of money should he invest a 7.5%?\"
\n" ); document.write( ";
\n" ); document.write( "Let x = amt invested at 7.5%
\n" ); document.write( "then \"three times as much money at 9% as at 7.5%\" therefore:
\n" ); document.write( "3x = amt invested at 9%
\n" ); document.write( ";
\n" ); document.write( "Write the interest equation:
\n" ); document.write( ".09(3x) + .075x = 1725
\n" ); document.write( ".27x + .075x = 1725
\n" ); document.write( ".345x = 1725
\n" ); document.write( "x = $\"1725%2F.345\"$
\n" ); document.write( "x = $5000 invested at 7.5%
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check solution (15000 invested at 9%)
\n" ); document.write( ".09(15000) + .075(5000) =
\n" ); document.write( "1350 + 375 = 1725 \n" ); document.write( "

\n" );