document.write( "Question 943601: After inheriting some money, a woman wants to invest enough to have an annual income of $5,000. If she can invest $20,000 at 9% annual interest, how much more would she have to invest at 7% to achieve her goal? \n" ); document.write( "

Algebra.Com's Answer #575292 by TimothyLamb(4379) $\"\"$ $\"About$

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x = amount invested at 7%
\n" ); document.write( "y = amount invested at 9%
\n" ); document.write( "---
\n" ); document.write( "0.07x + 0.09y = 5000
\n" ); document.write( "y = 20000
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form
\n" ); document.write( "---
\n" ); document.write( "0.07x + 0.09y = 5000
\n" ); document.write( "y = 20000
\n" ); document.write( "---
\n" ); document.write( "copy and paste the above standard form linear equations in to this solver:
\n" ); document.write( "http://sooeet.com/math/system-of-linear-equations-solver.php
\n" ); document.write( "---
\n" ); document.write( "solution:
\n" ); document.write( "x = 45714.286
\n" ); document.write( "y = 20000
\n" ); document.write( "---
\n" ); document.write( "answer:
\n" ); document.write( "x = 45714.29
\n" ); document.write( "y = 20000.00
\n" ); document.write( "---
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\n" ); document.write( "Solve and graph linear equations:
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\n" ); document.write( "--- \n" ); document.write( "

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