document.write( "Question 186033: My daughter asked me how old I am. I said in 20 years time I will be twice the age I was 12 years ago. How old am I? \n" ); document.write( "

Algebra.Com's Answer #139510 by Edwin McCravy(20056) $\"\"$ $\"About$

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My daughter asked me how old I am. I said in 20 years time I will be twice the age I was 12 years ago. How old am I?\r
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document.write( "I am N years old now and\r\n" );
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document.write( "N + 20, which is\r\n" );
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document.write( "which was N - 12, and twice that is 2(N - 12)\r\n" );
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document.write( "Therefore N + 20 must equal to 2(N - 12).\r\n" );
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document.write( "So we have the equation:\r\n" );
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document.write( "N + 20 = 2(N - 12)\r\n" );
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document.write( "Can you solve that?\r\n" );
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document.write( "Answer:  The mother is 44 years old.\r\n" );
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document.write( "Checking: 12 years ago she was 32 and in 20 year's\r\n" );
document.write( "time she will be 64, which is twice 32.  So it checks.\r\n" );
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document.write( "Edwin

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