document.write( "Question 547071: Solve using two equations in two variables.\r
\n" ); document.write( "\n" ); document.write( "Kathleen invested $5000, some at 6% and the rest at 5%. Her annual income from the investments is $280. How much is invested at 5%? \n" ); document.write( "
Algebra.Com's Answer #356190 by mananth(16946)\"\" \"About 
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Fund A 5.00% per annum ---x
\n" ); document.write( "Fund B 6.00% per annum ---y
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\n" ); document.write( "x+y=5000 ------------------------1
\n" ); document.write( "5.00% x + 6.00% y= = $280.00
\n" ); document.write( "Multiply by 100
\n" ); document.write( "5x+6y= $28,000.00 --------2
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\n" ); document.write( "Multiply (1) by -5
\n" ); document.write( "we get
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\n" ); document.write( "-5x-5y= -25000.00
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\n" ); document.write( "Add this to (2)
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\n" ); document.write( "y =$3,000.00 investment at 6.00%
\n" ); document.write( "Balance $2,000.00 investment at 5.00%
\n" ); document.write( "CHECK
\n" ); document.write( "$2,000.00 --------- 5.00% ------- $100.00
\n" ); document.write( "$3,000.00 ------- 6.00% ------- $180.00
\n" ); document.write( "Total -------------- $280.00
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