document.write( "Question 378759: what is x-y=3
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Algebra.Com's Answer #269023 by scott8148(6628)\"\" \"About 
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these two (perpendicular) lines intersect at (4,1)\r
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\n" ); document.write( "\n" ); document.write( "the solution of the system is x = 4 and y = 1
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