The value of x is 60
How to determine the value of x?
The complete question is added as an image
From the image, we have:
ABD = 30
DBC = x
The sum of complementary angles is 90.
So, we have:
30 + x = 90
Subtract 30 from both sides
x = 60
Hence, the value of x is 60
Read more about complementary angles at:
https://brainly.com/question/16281260
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