What is the length of side AB of parallelogram ABCD

Answer:
8 units
Step-by-step explanation:
Given in the question,
length of AB = 4q - 8
length of DC = q + 4
We know that parallel sides of parallelogram are equal so
The length AB = DC
4q - 8 = q + 4
4q - q = 8 + 4
3q = 12
q = 4
As AB = 4(4) - 8
= 8