Andrew M. answered • 09/07/17
Tutor
New to Wyzant
Mathematics - Algebra a Specialty / F.I.T. Grad - B.S. w/Honors
Line SEGMENT BC is bisected, or cut in half, by point D.
That means BD = DC
BC = 2DC
4x + 36 = 2(3x+6)
4x + 36 = 6x + 12
2x = 24
x = 12
DC = 3x+6 = 3(12)+6 = 42
