So, I've noticed that a lot of the "expert verified" answers are incorrect, and yet, they can't be reported, so you can't get them removed so that the right answers can be added, this is really annoying

Here is their argument. given the obtuse angle x, we make a quadrilateral abcd with ∠dab = x, and ∠abc = 90◦, and ad = bc. say the perpendicular bisector to dc meets the perpendicular bisector to ab at p. then pa = pb and pc = pd. so the triangles pad and pbc have equal sides and are congruent. thus ∠pad = ∠pbc. but pab is isosceles, hence ∠pab = ∠pba. subtracting, gives x = ∠pad−∠pab = ∠pbc −∠pba = 90◦. this is a preposterous conclusion – just where is the mistake in the "proof" and why does the argument break down there?

What is a possible solutions of the x> 3?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?