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Mathematics 13 Online
OpenStudy (daisy.xoxo619):

Given: Triangle ABC mANGLE A=2X+12 mANGLE C=4X mANGLE A + mANGLE C <180 BC

OpenStudy (kagıtucak):

2X+12+4X<180 6X<168 X<28 Also BC<AB so m(A)<m(C) 2X+12<4X 12<2X 6<X X>6 Combining them we get 6<X<28

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