Parallelogram JKLM is shown.

Parallelogram JKLM is divided into 4 triangles by K M and J L which intersect at point R. Angle L M K is 72 degrees, angle K J L is 56 degrees, and angle J M K is 27 degrees.

If KR = x + 7, KM = 3x − 5, and JL = 4x − 10, what are the values of x and JR?