document.write( "Question 829699: One positive number is 3 times another. The sum of two numbers is 720. What's the equation? \n" ); document.write( "

Algebra.Com's Answer #500035 by TimothyLamb(4379) $\"\"$ $\"About$

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\n" ); document.write( "x = 3y
\n" ); document.write( "x + y = 720
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form:
\n" ); document.write( "---
\n" ); document.write( "x - 3y = 0
\n" ); document.write( "x + y = 720
\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 = 540
\n" ); document.write( "y = 180
\n" ); document.write( "---
\n" ); document.write( "system matrix
\n" ); document.write( "1 -3
\n" ); document.write( "1 1
\n" ); document.write( "---
\n" ); document.write( "inverse of system matrix
\n" ); document.write( "0.25 0.75
\n" ); document.write( "-0.25 0.25
\n" ); document.write( "---
\n" ); document.write( "determinant of system matrix = 4
\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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