document.write( "Question 126300: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction?\r
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document.write( "3x-y = 7 2x+7y = 42 \n" );
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Algebra.Com's Answer #92572 by checkley71(8403)![]() ![]() ![]() 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 \n" ); document.write( "-------------------- \n" ); document.write( "23x=91 \n" ); document.write( " \n" ); document.write( " |