document.write( "Question 1153474: Sandy was 25 years old when her son was born. Her present age is 7 years less than three times her son's present age. How old is Sandy now?\r
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Algebra.Com's Answer #775694 by ikleyn(52800) $\"\"$ $\"About$

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document.write( "Let x = Sandy's age (the unknown under the question).\r\n" );
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document.write( "Then her son's age is (x-25) years.\r\n" );
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document.write( "From the condition,\r\n" );
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document.write( "    x = 3*(x-25) - 7.\r\n" );
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document.write( "Hence,\r\n" );
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document.write( "    x = 3x - 75 - 7\r\n" );
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document.write( "    x = 3x - 82\r\n" );
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document.write( "    82 = 3x - x\r\n" );
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document.write( "    82 = 2x\r\n" );
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document.write( "     x =  = 41.\r\n" );
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document.write( "ANSWER.  Sandy is 41 years old.\r\n" );
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