Answer:
x=25
Step-by-step explanation:
60+70=130
180-130=50
50/2=25
∠F +∠E + ∠D = 180 {Angle sum property of triangle}
2x +70 + 60 = 180
2x + 130 = 180
2x = 180 - 130
2x = 50
x = 50/2
x = 25
