a number is doubled and 9 is added. if the resultant is trebled, it becomes 81. what is that number?	Choose the correct choice from the following options
A) 3.5	B) 6	C) 8	D) 7	E) 9
<gadget id="calculator">3 * 9</gadget>
<output>27</output>

<gadget id="calculator">81 - 27</gadget>
<output>54</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">54 / 6</gadget>
<output>9</output>

<result>E</result>
a number is doubled and 9 is added. if the resultant is trebled, it becomes 81. what is that number?
divide(subtract(81, multiply(const_3, 9)), multiply(const_3, const_2))
"let the number be x . then , 3 ( 2 x + 9 ) = 81 2 x = 18 = > x = 9 answer : e"