document.write( "Question 867027: A total of $58,000 is invested in two municipal bonds that pay 4.25% and 7.25% simple interest. The investor wants an annual interest income of $3335 from the investments. What amount should be invested in the 4.25% bond? \n" ); document.write( "
Algebra.Com's Answer #522649 by mananth(16946)\"\" \"About 
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Part I 4.25% per annum ------------- Amount invested =x
\n" ); document.write( "Part II 7.25% per annum ------------ Amount invested = y
\n" ); document.write( " 58000
\n" ); document.write( "Interest----- 3335.00
\n" ); document.write( "
\n" ); document.write( "Part I 4.25% per annum ---x
\n" ); document.write( "Part II 7.25% per annum ---y
\n" ); document.write( "Total investment
\n" ); document.write( "x + 1 y= 58000 -------------1
\n" ); document.write( "Interest on both investments
\n" ); document.write( "4.25% x + 7.25% y= 3335
\n" ); document.write( "Multiply by 100
\n" ); document.write( "4.25 x + 7.25 y= 333500.00 --------2
\n" ); document.write( "Multiply (1) by -4.25
\n" ); document.write( "we get
\n" ); document.write( "-4.25 x -4.25 y= -246500.00
\n" ); document.write( "Add this to (2)
\n" ); document.write( "0 x 3 y= 87000
\n" ); document.write( "divide by 3
\n" ); document.write( " y = 29000
\n" ); document.write( "Part I 4.25% $ 29000
\n" ); document.write( "Part II 7.25% $ 29000
\n" ); document.write( "
\n" ); document.write( "CHECK
\n" ); document.write( "29000 --------- 4.25% ------- 1232.50
\n" ); document.write( "29000 ------------- 7.25% ------- 2102.50
\n" ); document.write( "Total -------------------- 3335.00
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\n" ); document.write( "m.ananth@hotmail.ca
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