document.write( "Question 1144813: Roni is 30 years old. Grace is 22 years old. How many years ago was Roni twice as old as Grace? \n" ); document.write( "

Algebra.Com's Answer #766031 by ikleyn(52800) $\"\"$ $\"About$

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document.write( "Let x be \"x years ago\".\r\n" );
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document.write( "Then you have this equation\r\n" );
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document.write( "    30-x = 2(22-x).\r\n" );
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document.write( "Simplify and solve for x.\r\n" );
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document.write( "    30 - x = 44 - 2x\r\n" );
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document.write( "    2x - x = 44 - 30\r\n" );
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document.write( "     x     = 14\r\n" );
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document.write( "ANSWER.  14 years ago.\r\n" );
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document.write( "CHECK.  14 years ago Toni was 30-14 = 16 years old; Grace was  22-14 = 8.\r\n" );
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document.write( "        16 = 2*8.    ! Correct !\r\n" );
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