document.write( "Question 828080: The length of a rectangle is 2 ft less than 3 times it's width. The perimeter is 12 ft. Find the length of the rectangle. \n" ); document.write( "

Algebra.Com's Answer #499147 by TimothyLamb(4379) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "x = 3y - 2
\n" ); document.write( "2x + 2y = 12
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form:
\n" ); document.write( "---
\n" ); document.write( "x - 3y = -2
\n" ); document.write( "2x + 2y = 12
\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 ft
\n" ); document.write( "y = 2 ft
\n" ); document.write( "---
\n" ); document.write( "system matrix
\n" ); document.write( "1 -3
\n" ); document.write( "2 2
\n" ); document.write( "---
\n" ); document.write( "inverse of system matrix
\n" ); document.write( "0.25 0.375
\n" ); document.write( "-0.25 0.125
\n" ); document.write( "---
\n" ); document.write( "determinant of system matrix = 8
\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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