document.write( "Question 820650: x + y + z = 200
\n" ); document.write( "3x + 5y + 4z =870
\n" ); document.write( "y=4z
\n" ); document.write( "You can use substitution solve the system above. Substitute 4z for y in the first two equations. What new system in two variables do you get? \n" ); document.write( "
Algebra.Com's Answer #493713 by TimothyLamb(4379)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "x + y + z = 200
\n" ); document.write( "3x + 5y + 4z = 870
\n" ); document.write( "y = 4z
\n" ); document.write( "---
\n" ); document.write( "put the system of linear equations into standard form
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\n" ); document.write( "x + y + z = 200
\n" ); document.write( "3x + 5y + 4z = 870
\n" ); document.write( "y - 4z = 0
\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
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\n" ); document.write( "answer:
\n" ); document.write( "x= 50
\n" ); document.write( "y= 120
\n" ); document.write( "z= 30
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\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
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\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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