Answer:
126°
Step-by-step explanation:
(2x +18)° = (3x)°
2x + 18 = 3x
18 = 3x - 2x
18 = x
therefore, (3x)° = (3*18)°= (54)°
[tex]m\angle SRW + (3x)\degree = 180\degree \\
m\angle SRW + 54\degree = 180\degree \\
m\angle SRW = 180\degree - 54\degree \\
\huge\red{\boxed{m\angle SRW = 126\degree}}[/tex]
