In the diagram below of triangle V, W, XVWX, YY is the midpoint of start overline, V, X, end overline
VX
and ZZ is the midpoint of start overline, W, X, end overline
WX
. If mangle, X, W, V, equals, 9, x, plus, 45∠XWV=9x+45, and mangle, X, Z, Y, equals, minus, 8, x, plus, 164∠XZY=−8x+164, what is the measure of angle, X, W, V∠XWV?