document.write( "Question 258240: 3 system..
\n" ); document.write( "x+2y+5z= -1
\n" ); document.write( "2x-y+z=2
\n" ); document.write( "3x+4y-4z=14
\n" ); document.write( "HELP ME PLEASE! \n" ); document.write( "

Algebra.Com's Answer #190109 by Edwin McCravy(20056) $\"\"$ $\"About$

You can put this solution on YOUR website!

\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Pick a letter and an equation to solve for it in.\r\n" );
document.write( "\r\n" );
document.write( "I will pick z and the second equation to solve for z in:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Substitute  for z in the other two\r\n" );
document.write( "equations, (but not the same one you just used) \r\n" );
document.write( "\r\n" );
document.write( "Substituting it in\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Substituting it in\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Now you just have this simple system:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "and I'll bet you can finish that by yourself, just by\r\n" );
document.write( "substituting back\r\n" );
document.write( "\r\n" );
document.write( "Answer x=2, y=1, z=-1 \r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( "

\n" );