Question

Can someone help me please?

Answer 1

Part 1:
m∠1+m∠2+m∠3=180
5X-5+3X+2X-5=180
10X-10=180
10X=190
X=19
That's the value of X~.
Part 2:
∠4=180-∠3
∠3=2X-5, because X=19
So, ∠3=33°
∠4=180-33
∠4=147°
That's your answer lovely~