Will mark brainliest question is in attachment

m<CBD = 68 degrees

Step-by-step explanation:

Add both of the given angle measures and set them equal to 90 degrees.

4x + 52 + 8x - 10 = 90    Combine like terms

12x + 42 = 90

      - 42  - 42                  Subtract 42 from both sides

12x = 48                           Divide both sides by 12

x = 4

Now plug this into the equation for m<CBD

4(4) + 52       Multiply

16 + 52          Add

68 degrees

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entering that problem on the tube might get you an answer

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right