Complementary angles are two angles that add up to 90 degrees. Given the angles as \(3x°\) and \((2x - 5)°\), we can set up the following equation:
\[ 3x + (2x - 5) = 90 \]
Combine like terms:
\[ 5x - 5 = 90 \]
Add 5 to both sides:
\[ 5x = 95 \]
Now, divide by 5:
\[ x = 19 \]
Now we can find the measures of the two angles:
- \(3x = 3(19) = 57°\)
- \(2x - 5 = 2(19) - 5 = 38 - 5 = 33°\)
So the two angles are \(57°\) and \(33°\).
Thus, the answer is:
33° and 57°.