document.write( "Question 468586: Determine whether the given ordered pair is a solution of the system.\r
\n" ); document.write( "\n" ); document.write( "(4, 5)
\n" ); document.write( "x + y = 9
\n" ); document.write( "x - y = -1
\n" ); document.write( "

Algebra.Com's Answer #321523 by rfer(16322)\"\" \"About 
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4+y=9
\n" ); document.write( "y=9-4
\n" ); document.write( "y=5
\n" ); document.write( "(4,5) ok
\n" ); document.write( "--------------
\n" ); document.write( "4-y=-1
\n" ); document.write( "-y=-5
\n" ); document.write( "y=5
\n" ); document.write( "(4,5) ok
\n" ); document.write( "
\n" );