Respuesta :

becasue m∠HKL=x+50, m∠HKJ=180-(x+50)=130-x
Because HJ=HK, M∠KJH=M∠HKJ=130-x
the three intererior angles make a sum of 180:
(x-30)+(130-x)+(130-x)=180
-x=-50
x=50