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shusha [124]
2 years ago
10

Answer plsss as soon as possible

Mathematics
1 answer:
shtirl [24]2 years ago
3 0

Answer:

Step-by-step explanation:

both angles must add up to 180 so

6x+12+3x+63 must =180

= 9x+75

9x+75=180

     -75  -75

9x=105

x=11.66

meaning A is approximately 81.96

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