document.write( "Question 108952This question is from textbook Harcourt Math Practice Workbook
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document.write( ": Two numbers have a difference of 10 and the sum of 34. What are the numbers?\r
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Algebra.Com's Answer #79445 by bucky(2189)![]() ![]() ![]() You can put this solution on YOUR website! Call the two unknown numbers x and y. \n" ); document.write( ". \n" ); document.write( "Since their difference is 10 you can write the equation: \n" ); document.write( ". \n" ); document.write( "x - y = 10 \n" ); document.write( ". \n" ); document.write( "And since their sum is 34 you can write the equation: \n" ); document.write( ". \n" ); document.write( "x + y = 34 \n" ); document.write( ". \n" ); document.write( "Write the two equations one above the other: \n" ); document.write( ". \n" ); document.write( "x - y = 10 \n" ); document.write( "x + y = 34 \n" ); document.write( ". \n" ); document.write( "Note that if you add the two equations vertically in columns that the -y of the top equation \n" ); document.write( "will cancel the +y of the bottom equation. So, adding vertically results in the x + x = 2x, \n" ); document.write( "the two y terms cancel, and on the right side the 10 + 34 = 44 \n" ); document.write( ". \n" ); document.write( "Therefore, the result of the addition is: \n" ); document.write( ". \n" ); document.write( "2x = 44 \n" ); document.write( ". \n" ); document.write( "And if you divide both sides of this equation by 2 you get: \n" ); document.write( ". \n" ); document.write( "x = 22 \n" ); document.write( ". \n" ); document.write( "Since x + y is to equal 34, then you can write: \n" ); document.write( ". \n" ); document.write( "22 + y = 34 \n" ); document.write( ". \n" ); document.write( "Subtracting 22 from both sides of this equation results in: \n" ); document.write( ". \n" ); document.write( "y = 12 \n" ); document.write( ". \n" ); document.write( "So the answer to this problem is that one of the numbers is 22 and the other is 12. \n" ); document.write( ". \n" ); document.write( "As a check, note that the difference of the two numbers is 22 - 12 = 10 and the sum of the \n" ); document.write( "two numbers is 22 + 12 = 34, just as the problem says things should be. \n" ); document.write( ". \n" ); document.write( "Hope this helps you to understand the problem a little better. \n" ); document.write( ". \n" ); document.write( " |