Here I will explain you friend So we know the exterior angle is 127 I am marking this triangle ABC So 127+angle B=180( Linear pair) So angle B = 180-127 Angle B =53 Also in this question it is AB = AC So it is an isosceles triangle So angle B = Angle X ( angles opposite to the equal side of the triangle are also equal) So Answer is x =53 Hope it helps you!
