The measure of Q must be 58°, the correct option is the third one.
How to find the measure?
The two triangles are equal only if the measures of the two shown angles are equal, then we need to solve the equation:
2x - 26 = x + 16
Solving this for x we will get:
2x - x = 16 + 26
x = 42
Now that we know the value of x, we can find the measure of Q.
∠Q = (x + 16)° = (42 + 16)° = 58°