angleA=x+42°. angleB = 4x - 12° and angleC = 3x+6°.
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Answer:
x=18°
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Step-by-step explanation:
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Answered by
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Step-by-step explanation:
Equation would be
as the sum of angles of a triangle is 180
so = x+42 + 4x - 12 + 3x + 6 = 180
= 8x + 36 = 180
= 8x = 144
= x = 18
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