Answer:
![x = 27](https://img.qammunity.org/2021/formulas/mathematics/high-school/qj4kndl7tfaipvz6gbo0x4cc9rw5zb811h.png)
Explanation:
Angle A and angle E are the same value, therefore you could replace angle E with angle A. So that would make a triangle with angle C, angle D, and angle A. Knowing the sum of all angles in a triangle is 180, we can make an equation representing this.
![3x - 10 + 2x + 10 + 45 = 180](https://img.qammunity.org/2021/formulas/mathematics/high-school/k3as5e5u08avomjzlmccitdlank5hcpewt.png)
Now simply silve the equation to find x.
![5x + 45 = 180 \\ 5x = 135 \\ x = 27](https://img.qammunity.org/2021/formulas/mathematics/high-school/yx3b1bzd2siqj8zqcx2vymx8thkrgs1l4i.png)
There is your answer.