EC bisects AD at C, so C is the midpoint of AD, so AC=CD
AC = CD
3x + 6 = 2x + 14
3x - 2x + 6 - 14 = 0
x - 8 = 0
x = 8
AD = AC + CD = 2 AC = 2 CD = 30 + 30 = 60
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