document.write( "Question 171362: When trying to decide if an ordered pair is a solution of a system of liner equation if the x is already negative and the x value given is also negative would it turn positive or stay negative?\r
\n" ); document.write( "\n" ); document.write( "Ex: (-9,5)
\n" ); document.write( " -x + 3y = 24
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Algebra.Com's Answer #126511 by gonzo(654)\"\" \"About 
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ordered pair: (-9,5)
\n" ); document.write( "equation: -x + 3y = 24
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\n" ); document.write( "you substitute -9 for x and 5 for y
\n" ); document.write( "-x + 3y = 24 becomes:
\n" ); document.write( "-(-9) + 3(5) = 24
\n" ); document.write( "this becomes:
\n" ); document.write( "9 + 15 = 24
\n" ); document.write( "24 = 24
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\n" ); document.write( "the -x in the equation is - (x)
\n" ); document.write( "you are substituting for x, not -x
\n" ); document.write( "it becomes - (-9)
\n" ); document.write( "which then becomes + because a minus of a minus is a plus.
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