document.write( "Question 590579: Dr. Blumen invested $5000. Part of it was invested in bonds at a rate of 6% and the rest was invested in a money market at a rate of 7.5%. If the annual interest is $337.50, how much did she invest in bonds? \n" ); document.write( "
Algebra.Com's Answer #375212 by mananth(16949)\"\" \"About 
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Bonds 6.00% per annum ---x
\n" ); document.write( "Money market 7.50% per annum ---y
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\n" ); document.write( "x+y= 5000 ------------------------1
\n" ); document.write( "6.00% x+7.50% y=337.5
\n" ); document.write( "Multiply by 100
\n" ); document.write( "6x+7.5y= = 33750.00 --------2
\n" ); document.write( "Multiply (1) by -6
\n" ); document.write( "we get
\n" ); document.write( "-6x-6y= -30000.00
\n" ); document.write( "Add this to (2)
\n" ); document.write( "0x+1.5y=3750
\n" ); document.write( "divide by 1.5
\n" ); document.write( "y = 2500 Bonds 7.50%
\n" ); document.write( "Balance 2500 Money market 6.00%
\n" ); document.write( "CHECK
\n" ); document.write( "2500 --------- 7.50% ------- 187.50
\n" ); document.write( "2500 ------- 6.00% ------- 150.00
\n" ); document.write( "Total -------------- 337.50
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