Angle a and angleb are vertical angles with m angle a= x and m angle b = 5x-80

In the equations, a and b represent the price per night for a room in hotel a and hotel b, respectively, w weeks after september 1 last autumn. what was the price per night in hotel a when it was equal to the price per night in hotel b? a = 240 − 20w b = 320 − 30w

Need on this one asap im almost done with this subject

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .