Answer:
x=9.4
b=77.2
Explanation:
a+b=180
as they are interior angles
(6x-48)+(4x+38)=180
6x-48+4x+38=180
6x+4x+38-48=180
10x+86=180
10x=180-86
10x=94
x=94/10
b=(4x+38)
b=4x+38
b=4(9.8)+38
b=39.2+38
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