document.write( "Question 769027: when solving a linear system such as this one: 9x-7y=31
\n" ); document.write( " -9x+3y=-39\r
\n" ); document.write( "\n" ); document.write( "how do you do it? I know its a simple problem but i'm confused on what to subtract or add.
\n" ); document.write( "

Algebra.Com's Answer #468634 by Alan3354(69443)\"\" \"About 
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when solving a linear system such as this one:
\n" ); document.write( "9x-7y=31
\n" ); document.write( "-9x+3y=-39\r
\n" ); document.write( "\n" ); document.write( "how do you do it?
\n" ); document.write( "----------
\n" ); document.write( "Since both x terms have a coefficient of 9,
\n" ); document.write( "9x-7y=31
\n" ); document.write( "-9x+3y=-39
\n" ); document.write( "--------------- Add
\n" ); document.write( "-4y = -8
\n" ); document.write( "etc
\n" ); document.write( "
\n" );