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Quadrilateral EFGH is a parallelogram, EG and FH bisect each other at point U.
A. What is the value of x if UH = 19 and FH = 5x – 7?
B. How long is GH and EF, if GH = 2x + 10 and EF = x + 15?
C. Find ∠, if ∠ = − and ∠ = + .