The lines "a" and "b" shown in the picture are parallel and crossed by a transversal line.
The angle that measures 65º and the adjacent angle to the one that measures (x+72)º are corresponding angles, which means that they are congruent.
Both adjacent angles are supplementary, which means that they add up to 180º
From this expression, you can determine the value of x, first, take the parentheses away and add the like terms:
Next, subtract 137 from both sides of the equation:
The value of x is 43 and the measure of the given angle is:
x+72 = 43+72 = 115º