A number is doubled and 9 is added. If the resultant is trebled, it becomes 51. What is that number?
Answers
A) 3.5
B) 6
C) 8
D) 7
E) 4
Let the number be x. Then,   3(2x + 9) = 51   2x = 8 =&gt; x = 4   ANSW4R:4
<result>E</result>
A number is doubled and 9 is added. If the resultant is trebled, it becomes 51. What is that number?