document.write( "Question 829744: Solve the system of equations by graphing x-y=-5 and x+y=13 \n" ); document.write( "

Algebra.Com's Answer #500060 by TimothyLamb(4379) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "x-y=-5
\n" ); document.write( "x+y=13
\n" ); document.write( "---
\n" ); document.write( "copy and paste the above linear system in standard form into this matrix-method 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 = 4
\n" ); document.write( "y = 9
\n" ); document.write( "---
\n" ); document.write( "system matrix
\n" ); document.write( "1 -1
\n" ); document.write( "1 1
\n" ); document.write( "---
\n" ); document.write( "inverse of system matrix
\n" ); document.write( "0.5 0.5
\n" ); document.write( "-0.5 0.5
\n" ); document.write( "---
\n" ); document.write( "determinant of system matrix = 2
\n" ); document.write( "---
\n" ); document.write( "by graphing:
\n" ); document.write( "---
\n" ); document.write( "y=x+5
\n" ); document.write( "y=-x+13
\n" ); document.write( "---
\n" ); document.write( " $\"+graph%28+300%2C+300%2C+-2%2C+6%2C+-2%2C+10%2C+x%2B5%2C+-x%2B13%29+\"$
\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( "

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