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kozerog [31]
2 years ago
6

4. In the diagram below, ZABD = (4x + 3)º and DBC = (7x-6)º.

Mathematics
1 answer:
blsea [12.9K]2 years ago
4 0

Answer:

Step-by-step explanation:

a) ∠ABD + ∠DBC = 90°

4x - 3 + 7x - 6 = 90

4x + 7x - 3 - 6 = 90

       11x -  9     = 90

              11x    = 90 + 9

              11x    = 99

                   x = 99/11

x = 9

∠ABD = 4*9 - 3 = 36 - 3 = 33

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