document.write( "Question 1116559: solve by the addition method.\r
\n" ); document.write( "\n" ); document.write( "x-4y=17
\n" ); document.write( "5x-4y=21\r
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Algebra.Com's Answer #731459 by Alan3354(69443)\"\" \"About 
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1x-4y=17
\n" ); document.write( "5x-4y=21
\n" ); document.write( "------------- Subtract, or multiply either eqn by -1, then add.
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