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Equation practice with segment addition

If:
AC=53\qquad AC = 53,
BC=2x+5\qquad BC = 2x + 5, and
AB=4x+6\qquad AB = 4x + 6,
Find BCBC.
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}