M∠ABD=87°
m∠ABC=9x−1°
m∠CBD=6x+58
Encuentra m∠ABC
1 answer:
Answer: 9x - 1 = 9(2) - 1 = 17
Step-by-step explanation:
m∠ABD = m∠ABC + m∠CBD
87 = 9x -1 + 6x + 58
87 = 15x + 57
30 = 15x
2 = x
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