document.write( "Question 820352: solve this system of equations 4a+7b=-30 8a+4c=-40 6b+4c=-20 \n" ); document.write( "
Algebra.Com's Answer #493500 by TimothyLamb(4379)\"\" \"About 
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4a + 7b = -30
\n" ); document.write( "8a + 4c = -40
\n" ); document.write( "6b + 4c = -20
\n" ); document.write( "---
\n" ); document.write( "change to standard variable names x y z
\n" ); document.write( "---
\n" ); document.write( "4x + 7y = -30
\n" ); document.write( "8x + 4z = -40
\n" ); document.write( "6y + 4z = -20
\n" ); document.write( "---
\n" ); document.write( "copy and paste the above standard form equations in to this solver:
\n" ); document.write( "https://sooeet.com/math/system-of-linear-equations-solver.php
\n" ); document.write( "---
\n" ); document.write( "answer:
\n" ); document.write( "x=a= -4
\n" ); document.write( "y=b= -2
\n" ); document.write( "z=c= -2
\n" ); document.write( "---
\n" ); document.write( "Solve and graph linear equations:
\n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php
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\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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