document.write( "Question 248214: This says solve by the substitution method
\n" ); document.write( "5x+9y=-11
\n" ); document.write( "-5x+y=21
\n" ); document.write( "it says the solution is an ordered pair, I get substitution mixed up with elimination can someone expain how to get this solution by the substitution method? Thanks so much
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Algebra.Com's Answer #180935 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
substitute the value of a quantity from one equation for the same quantity in another equation\r
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\n" ); document.write( "\n" ); document.write( "5x = -11 - 9y ___ -5x = 11 + 9y\r
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\n" ); document.write( "\n" ); document.write( "substituting ___ 11 + 9y + y = 21 ___ 10y = 10 ___ y = 1\r
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\n" ); document.write( "\n" ); document.write( "substituting ___ 5x = -11 - 9(1) ___ x = -4
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