There are 42 people in a certain community who belong to the local golf club, tennis club or both clubs. If twice as many people belong to the tennis club as belong to the golf club, what could be the number of people who belong to both clubs?	Choose the correct choice from the following answers
A) 1) 4	B) 2) 7	C) 3) 12	D) 4) 21	E) 5) 27
x -&gt; Golf 3) 12lub   2x -&gt; Tennis 3) 12lub   y -&gt; both   x+2x-y = 42   3x - y =42   multiples of 3 greater than 42   45   48   51   54-12= 
<gadget id="calculator">54-12</gadget>
<output>42</output>
42   IMO (3) 12)
<result>C</result>
There are 42 people in a certain community who belong to the local golf club, tennis club or both clubs. If twice as many people belong to the tennis club as belong to the golf club, what could be the number of people who belong to both clubs?