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lawyer [7]
3 years ago
15

Can you solve it ????

Mathematics
1 answer:
Dima020 [189]3 years ago
7 0
Angle ABD=87 degrees
angle ABC+angle CBD= angle ABD
Therefore, 9x-1+6x+58=87
15x+57=87
15x=87-57
15x=30
x=30/15
x=2   


Angle ABC= 9x-1
=9(2)-1
=18-1
=17 degrees


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