document.write( "Question 1040916: Find two numbers whose sum is 21 and whose difference is 11\r
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Algebra.Com's Answer #655843 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "a + b = 21,   (1)\r\n" );
document.write( "a - b = 11.   (2)\r\n" );
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document.write( "Add equations (1) and (2) (both sides). You will get\r\n" );
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document.write( "2a = 21 + 11 = 32,\r\n" );
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document.write( "hence, a =  = 16.\r\n" );
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document.write( "Then from (2) b = a-11 = 16-11 = 5.\r\n" );
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document.write( "Answer. The numbers ar 16 and 5.\r\n" );
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