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Someone help me with this ..
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Someone help me with this ..

Someone help me with this ..-example-1
User Didier Dupont
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3x+12=4x-15\\ x=27\\\\ \angle ABC=2(3x+12)=2(3\cdot27+12)=2(81+12)=2\cdot93=186^(\circ)
User Komang
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