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dimaraw [331]
3 years ago
14

OMG last one please help

Mathematics
1 answer:
vichka [17]3 years ago
3 0

Answer:

m<D = 14

Step-by-step explanation:

Exterior angles thm:

83 + 6x - 4 = 21x + 4

6x + 79 = 21x + 4

6x - 21x = 4 - 79

-15x = -75

x = 5

m<D:

6x - 4

6(3) - 4

18 - 4

14

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