Answer:
23
Step-by-step explanation:
co interior angles sum up to 180
[tex]3x - 1 + 5x = 180[/tex]
[tex]8x = 181 [/tex]
[tex] \frac{8x}{8} = \frac{181}{8} [/tex]
x
[tex] x = 23 approximately[/tex]
