Answer:
∠B = 26°
Step-by-step explanation:
Parallel lines and transversal:
r // s
When parallel lines are cut by a transversal, the alternate exterior angles are congruent.
∠B = ∠A
5x - 9 = 3x + 5
Add 9 to both sides
5x = 3x + 5 + 9
5x = 3x + 14
Subtract 3x from both sides,
5x - 3x = 14
2x = 14
Divide both sides by 2
x = 14/2
x = 7
∠B = 5x - 9
= 5*7 - 9
= 35 - 9
∠B = 26°
