If the sum of three consecutive even numbers is 30 more than the average of these numbers, then the largest of these numbers is? Choose the correct choice.
A) 20 B) 19 C) 18 D) 17 E) 16
Explanation:   Let the smallest of these number be x. The other two numbers are (x + 2) and (x + 4).   x + (x + 2) + (x + 4) = (X + (X+2) + (x+4)) / 3 + 30   3x + 3*(x + 2) + 3*(x + 4) = x + (x + 2) + (x + 4) + 90   9x + 18 = 3x + 96   6x = 78   x = 13   Therefore, the largest number is 17.   ANSWER 17
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If the sum of three consecutive even numbers is 30 more than the average of these numbers, then the largest of these numbers is?