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andreyandreev [35.5K]
3 years ago
5

Need help please geometry

Mathematics
1 answer:
BARSIC [14]3 years ago
5 0

Step-by-step explanation:

ABC = 90

ABC = ABD + DBC

4x + 7x -9 = 90

11 x = 99

x = 9

ABD = 4X = 4×9 = 36

DBC = 7X -9 = 63 -9 = 54

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