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document.write( "The sum of two numbers is 39 and their difference is 7. What are the numbers? \n" );
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Algebra.Com's Answer #83849 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! X+Y=39 OR X=39-Y \n" ); document.write( "X-Y=7 \n" ); document.write( "NOW REPLACE X BY (39-Y) IN THE SECOND EQUATION & SOLVE FOR Y. \n" ); document.write( "39-Y-Y=7 \n" ); document.write( "-2Y=7-39 \n" ); document.write( "-2Y=-32 \n" ); document.write( "Y=-32/-2 \n" ); document.write( "Y=16 ANSWER. \n" ); document.write( "X+16=39 \n" ); document.write( "X=39-16 \n" ); document.write( "X=23 ANSWER. \n" ); document.write( "PROOF \n" ); document.write( "23-16=7 \n" ); document.write( "7=7 \n" ); document.write( " |