Answer:
2b + 42 = 134 —> Opposite angles
2b= 134 – 42
2b= 92
b= 92/2
(2b+42) = 2(46)+42 = 92 +42= 134°
134 + (3a+4) =180
134+3a+4=180
3a+138=180
3a= 180 – 138
3a = 42
a=42/3
I hope I helped you^_^
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