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3 years ago

13

I’ll mark brainliest

1 answer:

IrinaK [193]3 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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