document.write( "Question 317497: Solve each system by addition.\r
\n" ); document.write( "\n" ); document.write( "x + y = 7
\n" ); document.write( "x – y = 9
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Algebra.Com's Answer #227359 by JBarnum(2146)\"\" \"About 
You can put this solution on YOUR website!
add them together
\n" ); document.write( "2x+0=16 divide by 2
\n" ); document.write( "x=8\r
\n" ); document.write( "\n" ); document.write( "can also subtract them
\n" ); document.write( "2y=-2
\n" ); document.write( "y=-1
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