
\n" );
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document.write( "The first equation contains only one unknown, x, so we\r\n" );
document.write( "can solve it for x separately:\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Divide every term by 2\r\n" );
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document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Factor the left side:\r\n" );
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document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Set each factor equal to 0:\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 we substitute in the other equation\r\n" );
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document.write( "
\r\n" );
document.write( "\r\n" );
document.write( "Substituting
\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( "So one solution is (2,
)\r\n" );
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document.write( "Substituting
\r\n" );
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document.write( "
\r\n" );
document.write( "
\r\n" );
document.write( "
\r\n" );
document.write( "
\r\n" );
document.write( "
\r\n" );
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document.write( "So the other solution is (1,
)\r\n" );
document.write( "\r\n" );
document.write( "Edwin
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document.write( "