WY is the perpendicularbisector of XZ.2y +7W2x + 3Y3x - 55y - 8Z= [?]

Since WY is the bisector of the segment XZ this means that the segments XY and YZ are equal, then:
[tex]\begin{gathered} 2x+3=3x-5 \\ 2x-3x=-5-3 \\ -x=-8 \\ x=8 \end{gathered}[/tex]Therefore, x=8.