The numerical length of CD is 3.
Given that,
- CD=x,BC=5x-5, and BD=2x+7
Based on the above information, the calculation is as follows:
We know that
BC = BC + CD
2x + 7 = 5x -5 + x
2x + 7 = 6x - 5
2x - 6x = -5-7
-4x = -12
x = 3
Learn more: https://brainly.com/question/5303391?referrer=searchResults
