Answer: The correct option is (A) 25.
Step-by-step explanation: We are given to find the value of x from the figure shown.
From the figure, we note that there are two parallel lines and a transversal.
Also, the angles with measurements (x + 40)° and (3x - 10)° are corresponding angles.
Since the measures of two corresponding angles are equal, so we must have

Thus, the required value of x is 25.
Option (A) is CORRECT.