Answer:
SolutioN :
- Set up an equation & solve for x :
[tex] \star \tt \: 15x - 7 - 3x + 151 = 180[/tex] [ Sum of co-interior angles ]
[tex] \longrightarrow \tt \: 12x + 144 = 180[/tex]
[tex] \longrightarrow \tt \: 12x = 36[/tex]
[tex] \longrightarrow \tt \: x = \frac{36}{12} [/tex]
[tex] \longrightarrow \tt \: x = \boxed{ \tt{3}}[/tex]
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