Note that angle XYZ is a sum of angles XYW and WYZ, in other words m(XYZ)=m(XYW)+m(WYZ)
But:
m(XYZ)=117
m(XYW)=6x+44
m(WYZ)=-10x+65
or:
117=6x+44+(-10x+65)
We now solve last equation to find x:
117=6x+44-10x+65
117=-4x+109
117-109=-4x+109-109
8=-4x
x=-2
Using x=-2 we calculate:
m(XYW)=6x+44=6(-2)+44=-12+44=32
m(WYZ)=-10x+65=-10(-2)+65=20+65=85
If you check the answer we get: 117=32+85