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the average of three consecutive even numbers is 72 what are the smallest of these numbers

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The example for consecutive  even numbers is 2,4,6,8,10,. . . .
The above consecutive even number series can be written as
        2,2+2,2+4,2+6,2+8,2+10, . . . . .
In the above series if we replace 2 in every number by “x”.
Then the above series can be rewritten as
        X, X+2,X+4,X+6, X+8, X+10, X+12,. . . . . . .
From the above series we can written as
2 consecutive even numbers = X, X+2
3 consecutive even numbers  =        X, X+2,X+4
4 consecutive even numbers =  X, X+2,X+4,X+6
5 consecutive even numbers =   X, X+2,X+4,X+6, X+8
Now we see the following problem
the average of three consecutive even numbers is 72 what are the smallest of these numbers.
We can write three consecutive even number series as
 3 consecutive even numbers =   X, X+2,X+4.
  Average = sum of elements/ no of elments
Average = (X+ X+2+X+4)/3
           72=(X+X+X+2+4)/3
           72X3= X+X+X+2+4
          216= 3X+2+4
          216=3X+6
          216-6=3X
          210=3X
It can be written as
           3X=210
            X= 210/3
              = 70
3 consecutive even numbers =   X, X+2,X+4
Substituting x =70
3 consecutive even numbers =   70,70+2, 70+4
                                                    =  70, 72,  74.
from the above series smallest number = 70.
From the above series biggest number = 74.
the average of three consecutive even numbers is 72  then the biggest of these numbers = 74

the average of three consecutive even numbers is 72  then the smallest of these numbers = 70.

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