document.write( "Question 517194: {-x+3y=-1
\n" ); document.write( "{x-2y=2 BY elmination\r
\n" ); document.write( "\n" ); document.write( "{x+y=7
\n" ); document.write( "{x+3y=11 by elmination\r
\n" ); document.write( "\n" ); document.write( "{4x-3y=-2
\n" ); document.write( "{4x+5y=14 by elmination\r
\n" ); document.write( "\n" ); document.write( "{x+2y=10
\n" ); document.write( "{3x-y=9 By elmination
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Algebra.Com's Answer #344699 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "I'll just do the second one, the only one with a\r\n" );
document.write( "fraction solution:\r\n" );
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document.write( "{ x + 3y = 11  \r\n" );
document.write( "{4x - 3y = -2\r\n" );
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document.write( "To eliminate the x's multiply the first equation through\r\n" );
document.write( "by -4, so that its first term will become -4x and will \r\n" );
document.write( "cancel with the 4x in the second equation:\r\n" );
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document.write( "-4x - 12y = -44\r\n" );
document.write( " 4x -  3y =  -2\r\n" );
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document.write( "Now when we add them term by term vertically we get:\r\n" );
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document.write( "-4x - 12y = -44\r\n" );
document.write( " 4x -  3y =  -2\r\n" );
document.write( "---------------\r\n" );
document.write( "     -15y = -46\r\n" );
document.write( "        y = \"%28-46%29%2F%28-15%29\"\r\n" );
document.write( "        y = \"46%2F15\"\r\n" );
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document.write( "Now to eliminate the y's, we don't need to\r\n" );
document.write( "multiply either one through because the terms\r\n" );
document.write( "in y are already opposite and will cancel just\r\n" );
document.write( "as they are.  So we add term by term vertically:\r\n" );
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document.write( "{ x + 3y = 11  \r\n" );
document.write( "{4x - 3y = -2\r\n" );
document.write( "-------------\r\n" );
document.write( " 5x      =  9\r\n" );
document.write( "       x = \"9%2F5\"\r\n" );
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document.write( "Solution is (x,y) = \"%28matrix%281%2C3%2C+++9%2F5%2C++%22%2C%22%2C++46%2F15+++%29+++++%29%29\"\r\n" );
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document.write( "Here are the solutions to the others.  You can solve them similar\r\n" );
document.write( "to the way I solved the second one:\r\n" );
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document.write( "{-x+3y=-1\r\n" );
document.write( "{x-2y=2 BY elmination:  Solution is (x,y) = (4,1)\r\n" );
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document.write( "{x+y=7\r\n" );
document.write( "{x+3y=11 by elmination:  Solved above.\r\n" );
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document.write( "{4x-3y=-2\r\n" );
document.write( "{4x+5y=14 by elmination:  Solution is (x,y) = (1,2)\r\n" );
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document.write( "{x+2y=10\r\n" );
document.write( "{3x-y=9 By elmination  Solution is (x,y) = (4,3)\r\n" );
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document.write( "Edwin
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