If the two angles are complementary, their measures add up to 90 degrees.
Therefore, the given angles \((x+2)^\circ\) and \((2x-4)^\circ\) can be combined to form the equation:
\[ (x + 2) + (2x - 4) = 90 \]
So, the written equation is:
\[ (x + 2)° + (2x - 4)° = 90° \]