Answer :
Given:
[tex]w=\frac{x-y}{2}-z[/tex]let us solve for y,
[tex]\begin{gathered} w=\frac{x-y}{2}-z \\ w=\frac{x-y-2z}{2} \\ 2w=x-y-2z \\ y=x-2z-2w \\ y=x-2(z+w) \end{gathered}[/tex]Thus the answer is,
[tex]y=x-2(w+z)[/tex]
Given:
[tex]w=\frac{x-y}{2}-z[/tex]let us solve for y,
[tex]\begin{gathered} w=\frac{x-y}{2}-z \\ w=\frac{x-y-2z}{2} \\ 2w=x-y-2z \\ y=x-2z-2w \\ y=x-2(z+w) \end{gathered}[/tex]Thus the answer is,
[tex]y=x-2(w+z)[/tex]