document.write( "Question 251790: The sum of two numbers is 43. The difference of the same two numbers is 12. What are the two numbers? \n" ); document.write( "

Algebra.Com's Answer #183482 by oberobic(2304) $\"\"$ $\"About$

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Let x + y = 43.
\n" ); document.write( "So,
\n" ); document.write( "x = 43-y and
\n" ); document.write( "y = 43-x
\n" ); document.write( ".
\n" ); document.write( "x - y = 12
\n" ); document.write( "So,
\n" ); document.write( "(43-y) -y = 12
\n" ); document.write( "43 -2y = 12
\n" ); document.write( "-2y = -31
\n" ); document.write( "y = -31/-2 = 15.5
\n" ); document.write( ".
\n" ); document.write( "x + y = 43
\n" ); document.write( "x + 15.5 = 43
\n" ); document.write( "x = 43 - 15.5 = 27.5
\n" ); document.write( ".
\n" ); document.write( "Is the sum 43?
\n" ); document.write( "x = 27.5
\n" ); document.write( "y = 15.5
\n" ); document.write( "x + y = 43
\n" ); document.write( "Yes!
\n" ); document.write( ".
\n" ); document.write( "Is the difference 12?
\n" ); document.write( "x = 27.5
\n" ); document.write( "y = 15.5
\n" ); document.write( "x - y = 12
\n" ); document.write( "Yes!
\n" ); document.write( ".
\n" ); document.write( "So the answer is:
\n" ); document.write( "The two numbers are 15.5 and 27.5.
\n" ); document.write( ".
\n" ); document.write( "Done. \n" ); document.write( "

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