Answer:
x = 104
Step-by-step explanation:
In ΔCDE , CD = CE. ⇒ΔCDE is an isosceles triangle.
So, ∠D = ∠E = 71°
∠DCE + 71 + 71 = 180 {Angle sum property of triangle}
∠DCE + 142 = 180
∠DCE = 180 - 142 = 38
∠ACB = ∠DCE {Vertically opposite angles}
∠ACB = 38
ΔABC is also an isosceles triangle where ∠ACB = ∠B = 38
x + 38 + 38 = 180
x + 76 = 180
x = 180 - 76
x = 104
