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qwelly [4]
4 years ago
9

HELP!! I WILL MARK YOU BRANLIEST IF YOU RESPOND THE FASTEST AND IF ITS CORRECT :)

Mathematics
2 answers:
vitfil [10]4 years ago
8 0

Answer:

∠B = 45°

Step-by-step explanation:

∠A = ∠B

5x - 15 = 2x + 21

5x - 2x = 15 + 21

3x = 36

x = 12

⇒∠B = 45

Kruka [31]4 years ago
5 0

Answer:

45

Step-by-step explanation:

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