Answer:
x = 38°
Step-by-step explanation:
this is a four-sided polygon, so the sum of the interior angles measures 360 degrees; formula is (n - 2) · 180 where 'n' is the number of sides
add all four expressions and set equal to 360
5x - 33 + 5x + 13 = 360
10x - 20 = 360
10x = 380
x = 38
check by plugging 38 into each expression to make sure the total is 360
starting in upper left and moving clockwise, the angles are: 75°, 82°, 114°, 89°
