First identify the angle RELATIONSHIP, then find the measure of the angle indicated in bold.

Answer:
Same-side interior angles
m∠ = 110°
Step-by-step explanation:
Step 1: Set up equation
6x + 16 + 13x - 7 = 180
Step 2: Combine like terms
19x + 9 = 180
Step 3: Isolate x and solve
19x = 171
x = 9
13(9) - 7 = 110°