Answer:
<VYX +<YVX+<VXY=180 SUM OF THE INTERIOR ANGLE OF THE TRIANGLE
90+5X-12+2X-3=180
7X=180-75
X=105/7=15
X=15°
again
in right angled triangle XYZ
<Y+<Z+<X=180
<y+90+2×15-3=180
[here diagonal of the rectangular bisect each at 90°]
<Y=180-117=63°
M<VWZ= <XYZ=63° alternate angle