Find the value of x in the trapezoid below. Show equations and all work that leads to your answer.

Since the side is a transversal to the parallel bases, the angles formed are supplementary. This lets you write the relation
... (3x-5)° + (5x+13)° = 180°
... 8x +8 = 180
... x = (180 -8)/8 = 21.5
The value of x is 21.5.