In the diagram below of triangle EFGEFG, HH is a midpoint of \overline{EF}EF and JJ is a midpoint of \overline{FG}FG.

In the diagram below of triangle EFGEFG, HH is a midpoint of \overline{EF}EF and JJ is a midpoint of \overline{FG}FG. If m\angle JHF=7x+62m∠JHF=7x+62, and m\angle GEH=79-10xm∠GEH=79−10x, what is the measure of \angle JHF∠JHF?