cidaliaaa
cidaliaaa
12-08-2014
Mathematics
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konrad509
konrad509
12-08-2014
[tex]3x+12=4x-15\\ x=27\\\\ \angle ABC=2(3x+12)=2(3\cdot27+12)=2(81+12)=2\cdot93=186^{\circ}[/tex]
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