document.write( "Question 759645: Solve the system of equations and give the value of x:\r
\n" ); document.write( "\n" ); document.write( "3x + 12y = 9\r
\n" ); document.write( "\n" ); document.write( "x = -4y - 3\r
\n" ); document.write( "\n" ); document.write( "Please show details thank you so much. \n" ); document.write( "
Algebra.Com's Answer #462124 by oscargut(2103)\"\" \"About 
You can put this solution on YOUR website!
3x + 12y = 9
\n" ); document.write( "x = -4y - 3 \r
\n" ); document.write( "\n" ); document.write( "Then:\r
\n" ); document.write( "\n" ); document.write( "3x + 12y = 9
\n" ); document.write( "x +4y = -3\r
\n" ); document.write( "\n" ); document.write( "If we multiply the 2nd equation by -3 we have :\r
\n" ); document.write( "\n" ); document.write( "3x + 12y = 9
\n" ); document.write( "-3x -12y = 9\r
\n" ); document.write( "\n" ); document.write( "Adding them:\r
\n" ); document.write( "\n" ); document.write( "0x+0y = 18 (not true)\r
\n" ); document.write( "\n" ); document.write( "Answer: The system has no solution \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "If you need more help with math questions/assignments/tests
\n" ); document.write( "You can ask me more using this e-mail (mthman@gmail.com) or you can visit my site:
\n" ); document.write( "http://mathshelp-online.com/
\n" ); document.write( "(Payment is using paypal)
\n" ); document.write( " \n" ); document.write( "
\n" );