Answers:
ZY = 9
XW = 9
=================================
Work Shown:
ZX = 5x+17
ZY+YX = 5x+17
ZY+3 = 5x+17
ZY = 5x+17-3
ZY = 5x+14
-----------
YW = 10-2x
YX+XW = 10-2x
3+ZY = 10-2x
3+(5x+14) = 10-2x
5x+17 = 10-2x
5x+2x = 10-17
7x = -7
x = -7/7
x = -1
-----------
ZY = 5x+14
ZY = 5(-1)+14
ZY = -5+1
ZY = 9
ZY = XW = 9