document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1129650>Question 1129650</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Amy invests $1500 in one account and $1900 in an account paying 3 % higher interest. At the end of one year she had earned $261 in interest. At what rates did she invest?\r<BR>\n" );
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document.write( "1500 invested at - <BR>\n" );
document.write( "1900 invested at-  </SPAN>\n" );
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document.write( "Here is a solution using some logical reasoning and some mental arithmetic, instead of formal algebra.<br><BR>\n" );
document.write( "First consider the \"extra\" 3% that is earned on the $1900 investment.  The amount of interest there is .03($1900) = $57.<br><BR>\n" );
document.write( "The remaining amount of interest is $261-$57 = $204.  That is the amount of interest on the whole investment of $3400.  Since we have accounted for the interest from the extra 3% on the second investment, that $204 interest is now all at the lower rate.<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=204%2F3400+=+6%2F100 ALIGN=MIDDLE  ALT=\"204%2F3400+=+6%2F100\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 6%<br><BR>\n" );
document.write( "The $1500 was invested at 6%; the $1900 was invested at 6%+3% = 9%. </SPAN>\n" );
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