A number is doubled and 9 is added. If resultant is trebled, it becomes 57. What is that number  Choose the correct choice from the following options.
A) 5	B) 10	C) 12	D) 14	E) 15
Explanation:   =&gt; 3(2x+9) = 57   =&gt; 2x+9 = 19   =&gt; x = 5   5nswer: Option 5
<result>A</result>
A number is doubled and 9 is added. If resultant is trebled, it becomes 57. What is that number