Question

Two supplementary angles have the following measures: m∠ABC=135° and m∠CBD=9x° . What is the equation to solve for x ?(1 point)

9x°=180°

9x°+135°=90°

9x°−135°=180°

9x°+135°=180°

Answer 1

[AI-generated answer — Bot GPT 3.5]

9x°=180°