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Answer :

Answer:

114°

Step-by-step explanation:

to understand this

you need to know about:

  • equation
  • PEMDAS

tips and formulas:

  • a straight line contains 180°

let's solve:

[tex] step - 1 : define[/tex]

[tex]b + 66 = 180[/tex]

[tex]step - 2 : solve[/tex]

  1. cancel 66 from both sides:b+66-66=180-66
  2. therefore b=114

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