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slamgirl [31]
2 years ago
13

I’ll mark brainliest

Mathematics
1 answer:
IrinaK [193]2 years ago
5 0

Answer:

7, 65°

Step-by-step explanation:

(18b-11)+(9b+2)=180°

27b-9=180°

27b=189

b=7

9b+2

9×7+2

63+2

65

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