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The numbers are (x-1), x and (x+1).
The sum is (x-1) + x + (x+1) = 33.
The equation is 3x = 33.
The solution is x = 33/3 = 11.
The numbers are 10, 11, 12. ANSWER
CHECK. 10 + 11 + 12 = 33. ! Correct !
Solved.