document.write( "Question 1151600: 2x+12y=-7,4x-3y=7 \n" ); document.write( "
Algebra.Com's Answer #773401 by Edwin McCravy(20054)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "\r\n" );
document.write( "Elimination is the best way since there are no terms that are just \r\n" );
document.write( "x, -x, y, or -y.\r\n" );
document.write( "\r\n" );
document.write( "To make the x terms cancel out, multiply the first equation through\r\n" );
document.write( "by -2. Then the 2x will become -4x and will cancel when we add the\r\n" );
document.write( "two equations term by term:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Now we add them term by term we get\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "When the first letter comes out to a fraction, instead of substituting it, it is\r\n" );
document.write( "often easier to start all over and eliminate the other letter y.  I will do that\r\n" );
document.write( "to illustrate, even though substituting that fraction would be easy.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "To make the y terms cancel out, multiply the second equation through\r\n" );
document.write( "by 4. Then the -3y will become -12y and will cancel when we add the\r\n" );
document.write( "two equations term by term:\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Now we add them term by term we get\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Edwin

\n" ); document.write( " \n" ); document.write( "
\n" );