document.write( "Question 697259: determine the best method to solve the system of equations. then solve the system
\n" ); document.write( "-4x+5y=9, 4x-5y=-7
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Algebra.Com's Answer #429832 by Alan3354(69443)\"\" \"About 
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determine the best method to solve the system of equations. then solve the system
\n" ); document.write( "-4x+5y=9
\n" ); document.write( "4x -5y=-7
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\n" ); document.write( "Add the 2 equations.
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