document.write( "Question 933009: Fran receives $153 per year in simple interest from investing $1900. Part is invested at 7%, 8%, and 9%. There is a $100 more invested at 9% than 8%. find the amount invested at each rate \n" ); document.write( "

Algebra.Com's Answer #566523 by TimothyLamb(4379) $\"\"$ $\"About$

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x = amount invested at 7%
\n" ); document.write( "y = amount invested at 8%
\n" ); document.write( "z = amount invested at 9%
\n" ); document.write( "---
\n" ); document.write( "x + y + z = 1900
\n" ); document.write( "0.07x + 0.08y + 0.09z = 153
\n" ); document.write( "z = y + 100
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form
\n" ); document.write( "---
\n" ); document.write( "x + y + z = 1900
\n" ); document.write( "0.07x + 0.08y + 0.09z = 153
\n" ); document.write( "y - z = -100
\n" ); document.write( "---
\n" ); document.write( "copy and paste the above standard form linear equations in to this solver:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php
\n" ); document.write( "---
\n" ); document.write( "solution:
\n" ); document.write( "x = amount invested at 7% = 600
\n" ); document.write( "y = amount invested at 8% = 600
\n" ); document.write( "z = amount invested at 9% = 700
\n" ); document.write( "---
\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve quadratic equations, quadratic formula:
\n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php
\n" ); document.write( "---
\n" ); document.write( "Solve systems of linear equations up to 6-equations 6-variables:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php
\n" ); document.write( "--- \n" ); document.write( "

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