document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1196499>Question 1196499</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Paul and Donna Petrie invested ​$34,000, part at 2% simple interest and the rest 7% at simple interest for a period of 1 year. How much did they invest at each rate if their total annual interest from both investments was 1380​? </SPAN>\n" );
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document.write( "​$34,000, part at 2% simple interest and the rest 7% at simple interest for a period of 1 year. How much did they invest at each rate if their total annual interest from both investments was 1380​?<BR>\n" );
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document.write( "This kind done thousands of times.\r<BR>\n" );
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document.write( "... invest ​$P, part at L% simple interest and the rest H% at simple interest for a period of 1 year. How much did they invest at each rate if their total annual interest from both investments was Y​?<BR>\n" );
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document.write( "v invested at H%<BR>\n" );
document.write( "P-v invested at L%<BR>\n" );
document.write( "P = 34000<BR>\n" );
document.write( "Y =1380\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%28%281%2F100%29Hv%2B%281%2F100%29L%28P-v%29=Y%29 ALIGN=MIDDLE  ALT=\"highlight_green%28%281%2F100%29Hv%2B%281%2F100%29L%28P-v%29=Y%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Hv%2BL%28P-v%29=100Y ALIGN=MIDDLE  ALT=\"Hv%2BL%28P-v%29=100Y\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=Hv%2BLP-Lv=100Y ALIGN=MIDDLE  ALT=\"Hv%2BLP-Lv=100Y\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28H-L%29v=100Y-LP ALIGN=MIDDLE  ALT=\"%28H-L%29v=100Y-LP\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=v=%28100Y-LP%29%2F%28H-L%29 ALIGN=MIDDLE  ALT=\"v=%28100Y-LP%29%2F%28H-L%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >----------substitute the given values and evaluate v. </SPAN>\n" );
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