document.write( "Question 151249: Please assistance in solving equation for x.
\n" ); document.write( " \"A=%28matrix%283%2C3%2C2%2C2%2C0%2C-4%2C-3%2C2%2C0%2C-3%2C-5%29%29\", \"B=%28matrix%283%2C1%2C-10%2C2%2C-9%29%29\", \"X=%28matrix%283%2C1%2Cx%2Cy%2Cz%29%29\", \"AX=B\" \n" ); document.write( "
Algebra.Com's Answer #111165 by Edwin McCravy(20065)\"\" \"About 
You can put this solution on YOUR website!
Please assistance in solving equation for x.\r
\n" ); document.write( "\n" ); document.write( "\"A=%28matrix%283%2C3%2C2%2C2%2C0%2C-4%2C-3%2C2%2C0%2C-3%2C-5%29%29\", \"B=%28matrix%283%2C1%2C-10%2C2%2C-9%29%29\", \"X=%28matrix%283%2C1%2Cx%2Cy%2Cz%29%29\", \"AX=B\"
\n" ); document.write( "
\r\n" );
document.write( "We make the equation \"AX=B\"\r\n" );
document.write( "\r\n" );
document.write( " \r\n" );
document.write( "\r\n" );
document.write( "Do you know how to find the inverse of a matrix?\r\n" );
document.write( "If not post again asking how.  The inverse of \r\n" );
document.write( "matrix A is:\r\n" );
document.write( "\r\n" );
document.write( "\"A%5E%28-1%29=%28matrix%283%2C3%2C21%2F2%2C5%2C2%2C-10%2C-5%2C-2%2C6%2C3%2C1%29%29\"\r\n" );
document.write( "\r\n" );
document.write( "So we left-multiply both sides of the equation by this\r\n" );
document.write( "inverse matrix, \"A%5E%28-1%29\"\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Do you know how to multiply matrices?  If not\r\n" );
document.write( "post again asking how.\r\n" );
document.write( "\r\n" );
document.write( "Multiply the matrices and get this:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\"%28matrix%283%2C1%2Cx%2Cy%2Cz%29%29=%28matrix%283%2C1%2C-113%2C108%2C-63%29%29\"\r\n" );
document.write( "\r\n" );
document.write( "So \"x=-113\", \"y=108\", \"z=-63\"\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );