2(3x + 1) > 3
2(3x) + 2(1) > 3
6x + 2 > 3
<u> - 2 - 2</u>
<u>6x</u> > <u>1</u>
6 6
x > 0.167
So you know that the sum of angles in a triangle is 180°.
You know two of the angles in triangle WXZ. The two angles are angle WXZ, which is 50° and angle XWZ, which is 90°.
Now you can calculate angle WZX, by:
180-50-90=40°.