One Third of a number X is equal to 22 less than the number.
Just write an equation for what is says
x = x - 22
Get rid of the fraction, multiply both sides by 3
x = 3(x-22)
x = 3x - 66
66 = 3x - x
66 = 2x
x = 66/2
x = 33
:
You can check this for yourself, replace x with 33 in the original equation