A person was asked to state his age in years. His reply was, “Take my age three years hence, multiply it by 3 and then subtract three times my age three years ago and you will know how old I am.” What was the age of the person?
Choose the correct choice: A) 14 years B) 18 years C) 20 years D) 32 years E) none
Solution   Let the present ages of the person be x years.   Then	3(x-3)-3(x-3)   ‹=› x= (3x+9)-(3x-9)   x=18.   Answer 18 years(3 +9)-(3 -9)= 
<gadget id="calculator">(3 +9)-(3 -9)</gadget>
<output>18</output>
18.   Answer 18 years
<result>B</result>
A person was asked to state his age in years. His reply was, “Take my age three years hence, multiply it by 3 and then subtract three times my age three years ago and you will know how old I am.” What was the age of the person?