Question

What is x and the unknown angle? May I also get a brief explanation of how to do it?​

Answer 1

see explanation

Explanation:

The 2 angles are adjacent on a straight line and sum to 180° , then

149 + 13x + 5 = 180 , that is

154 + 13x = 180 ( subtract 154 from both sides )

13x = 26 ( divide both sides by 13 )

x = 2

Then

unknown angle = 13x + 5 = 13(2) + 5 = 26 + 5 = 31°

Answer 2

149+(13x+5)=180

154+13x=180

13x=26

x=2