You are solving for x, correct?
Answer:
x = 1/2
Step-by-step explanation:
4(3x - 2) + 2³ = 6
12x - 8 + 8 = 6
12x = 6
x = 1/2
Supplementary angles add up to 180 degrees, so look for two angles by each other that add up to 180 degrees.
Hope this Helps!