To solve the equation -2/3 + 1/4 - x = 0, we first need to simplify the equation by finding a common denominator for -2/3 and 1/4.

-2/3 = -8/12
1/4 = 3/12

Now the equation becomes:

-8/12 + 3/12 - x = 0
-5/12 - x = 0

Now we can solve for x by isolating it on one side of the equation:

-x = 5/12
x = -5/12

Therefore, the solution to the equation -2/3 + 1/4 - x = 0 is x = -5/12.