Im confused I need a bit of help

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

What is the measure of angle z in this figure? enter your answer in the box. z = ° two intersection lines. all four angles formed by the intersecting lines are labeled. clockwise, the angles are labeled 43 degrees, x degrees, y degrees, and z degrees.

How do you use the elimination method for this question? explain, because i really want to understand!