document.write( "Question 1142298: One of my math problems asks that you use Cramer's rule to solve this linear system.
\n" ); document.write( "5x+10y=70
\n" ); document.write( "5x+25z=270
\n" ); document.write( "10y+25z=300
\n" ); document.write( "When I put zeros on the third column to make it a 3x3 because it has to be the same I get 0. Please help me solve this problem \n" ); document.write( "
Algebra.Com's Answer #763012 by ikleyn(52803)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "On solving 3 x 3-systems of linear equation by the Cramer's rule see the lesssons\r
\n" ); document.write( "\n" ); document.write( "    - Determinant of a 3x3 matrix \r
\n" ); document.write( "\n" ); document.write( "    - Co-factoring the determinant of a 3x3 matrix \r
\n" ); document.write( "\n" ); document.write( "    - HOW TO solve system of linear equations in three unknowns using determinant (Cramer's rule)\r
\n" ); document.write( "\n" ); document.write( "    - Solving systems of linear equations in three unknowns using determinant (Cramer's rule)\r
\n" ); document.write( "\n" ); document.write( "    - Solving word problems by reducing to systems of linear equations in three unknowns\r
\n" ); document.write( "\n" ); document.write( "in this site.\r
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\n" ); document.write( "\n" ); document.write( "Also,  you have this free of charge online textbook in ALGEBRA-II in this site\r
\n" ); document.write( "\n" ); document.write( "    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.\r
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\n" ); document.write( "\n" ); document.write( "The referred lessons are the part of this online textbook under the topic
\n" ); document.write( "     \"3x3-Matrices, determinants, Cramer's rule for systems in three unknowns\" \r
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\n" ); document.write( "\n" ); document.write( "Save the link to this textbook together with its description\r
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\n" ); document.write( "\n" ); document.write( "Free of charge online textbook in ALGEBRA-II
\n" ); document.write( "https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson\r
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\n" ); document.write( "\n" ); document.write( "into your archive and use when it is needed.\r
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document.write( "In addition,  there are many free of charge SOLVERS on a Cramer's rule in the Internet.\r\n" );
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document.write( "One of such popular solvers is in this site under the links\r\n" );
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document.write( "    https://www.algebra.com/algebra/homework/Matrices-and-determiminant/determinant-of-3x3-matrix.solver\r\n" );
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document.write( "    https://www.algebra.com/algebra/homework/Matrices-and-determiminant/cramers-rule-3x3.solver\r\n" );
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document.write( "Also, there are many sites in the Internet containing (free of charge) solvers to calculate 3x3 - determinants \r\n" );
document.write( "and to solve systems of equations by the Cramer's rule -- see, for example,\r\n" );
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document.write( "    https://www.algebra.com/algebra/homework/Matrices-and-determiminant/determinant-of-3x3-matrix.solver\r\n" );
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document.write( "and\r\n" );
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document.write( "    https://www.algebra.com/algebra/homework/Matrices-and-determiminant/cramers-rule-3x3.solver\r\n" );
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document.write( "directly in the site www.algebra.com\r\n" );
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document.write( "and universal multi-purpose solver \r\n" );
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document.write( "    http://www.reshish.com\r\n" );
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document.write( "with many options.\r\n" );
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\n" ); document.write( "\n" ); document.write( "In your case,  of course,  the key issue was to write the matrix in correct form (!)\r
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