document.write( "Question 456599: How do I substitute a problem like this?\r
\n" ); document.write( "\n" ); document.write( "y = x + 3
\n" ); document.write( "y = 2x + 12
\n" ); document.write( "

Algebra.Com's Answer #853415 by ikleyn(53570)\"\" \"About 
You can put this solution on YOUR website!
.
\n" ); document.write( "How do I substitute a problem like this?
\n" ); document.write( "y = x + 3
\n" ); document.write( "y = 2x + 12
\n" ); document.write( "~~~~~~~~~~~~~~~~~~~~~~~~\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "In his post, @mananth obtained the solution x = -9, y = -6.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "This is correct.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "But then, @mananth points that the ordered solution is (-6,-9).\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "This is NOT an ordinary/commonly accepted order.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "The ordinary/commonly accepted order is opposite (x,y) = (-9,-6).\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "
\n" );