i need this fast guys. and please show step by step process

Answer:
x°=48°
Step-by-step explanation:
angle Y=x°
angle Z= angle y, because equal side of the angles are equal.
so, angle X +angleY+ angle Z=180° ( angle sum property of triangles)
therefore 84°+x°+x°=180°
2x°=180° -84°
2x°=96°
x°=48°