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)![]() ![]() You can put this solution on YOUR website! 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( " |