document.write( "Question 103256: Translate to a system of equations and solve:\r
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document.write( "The sum of two numbers is 30. Their difference is 40. Find the numbers \n" );
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Algebra.Com's Answer #75142 by HyperBrain(694)![]() ![]() ![]() You can put this solution on YOUR website! Let x= the first no. \n" ); document.write( " y= the other no.\r \n" ); document.write( "\n" ); document.write( "(1)x+y=30 \n" ); document.write( "(2)x-y=40 \n" ); document.write( "From (2), \n" ); document.write( "x=y+40, substituting this to (1),\r \n" ); document.write( "\n" ); document.write( "y+40+y=30 \n" ); document.write( " 2y+40=30 \n" ); document.write( " 2y=-10 \n" ); document.write( " y=-5\r \n" ); document.write( "\n" ); document.write( "Solving for x, \n" ); document.write( "x-5=30 \n" ); document.write( " x=35 \n" ); document.write( "Therefore, the 2 nos. are 35 and -5 \n" ); document.write( " |