Question

помагите пжпжпж 100 балл ​

Answer 1

<AOB + <BOD + <DOE = 180°

15° + 135° + <DOE = 180°

150° + <DOE = 180°

<DOE = 180° - 150°

<DOE = 30°

<DOE = (x-9)°

(x-9)° = 30°

x = 30° + 9°

x = 39°