Answer:
x = 39°
Explanation:
Quadrilateral is a four-sided polygon. Sum of all angles of any quadrilateral is 360°
3x - 17 + 2x + 2 + 90 + 90 = 360°
3x + 2x - 17 + 2 + 180 = 360
Combine like terms. Like terms have same variable with same power. Here, 3x & 2x are like terms and 2, 180, (-17) are constants.
5x + 165 = 360
Subtract 165 from both sides,
5x = 360 - 165
5x = 195
Divide both sides by 5,
x = 195 ÷ 5
x = 39°