Mathematics, 21.01.2021 22:20 cesar566

Given \qquad m \angle ABD = 87^\circm∠ABD=87
∘
m, angle, A, B, D, equals, 87, degrees
\qquad m \angle ABC = 9x - 1^\circm∠ABC=9x−1
∘
m, angle, A, B, C, equals, 9, x, minus, 1, degrees
\qquad m \angle CBD = 6x + 58^\circm∠CBD=6x+58
∘
m, angle, C, B, D, equals, 6, x, plus, 58, degrees
Find m\angle ABCm∠ABCm, angle, A, B, C:

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Given \qquad m \angle ABD = 87^\circm∠ABD=87
∘
m, angle, A, B, D, equals, 87, degrees<...

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