document.write( "Question 126300: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction?\r
\n" ); document.write( "\n" ); document.write( "3x-y = 7 2x+7y = 42
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Algebra.Com's Answer #92572 by checkley71(8403)\"\" \"About 
You can put this solution on YOUR website!
7(3x-y=7) will eliminate the y variable when added to the other equation-thus:
\n" ); document.write( "21x-7y=49
\n" ); document.write( "2x+7y=42
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\n" ); document.write( "23x=91
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