Answer:
![z = (pu-W)/(p)\\\\](https://img.qammunity.org/2022/formulas/mathematics/college/kchh9yyd8xiz82a5pxbou7ugvcxq2lijuv.png)
We can write this as z = (pu-W)/p
This is the single fraction with pu-W up top and p in the denominator.
Other answers are possible.
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Work Shown:
![W=p(u-z)\\\\W=pu-pz\\\\W+pz=pu\\\\pz=pu-W\\\\z=(pu-W)/(p)\\\\](https://img.qammunity.org/2022/formulas/mathematics/college/mrgol1o7b0cs7tewrd91ubdm2q3qbsmi21.png)
An alternative method could have these steps instead
![W=p(u-z)\\\\u-z = (W)/(p)\\\\-z = (W)/(p)-u\\\\z = -(W)/(p)+u\\\\z = -(W)/(p)+(pu)/(p)\\\\z = (-W+pu)/(p)\\\\z = (pu-W)/(p)\\\\](https://img.qammunity.org/2022/formulas/mathematics/college/nw04jsvf8a1oz6mqtfk40uwj4ecjgjlswd.png)