document.write( "Question 1092510: Shawn is 20 and his brother is 12 how many years ago was shown three times as old as his brother \n" ); document.write( "

Algebra.Com's Answer #707135 by ikleyn(52790) $\"\"$ $\"About$

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document.write( "Let x = how many years ago.\r\n" );
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document.write( "Then the condition requires  (20-x) = 3*(12-x)  ====>\r\n" );
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document.write( "20 - x = 36 - 3x  ====>  3x - x = 36 - 20  ====>  2x = 16  ====>  x = 8.\r\n" );
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