Odpowiedź:
P= s + ¼V
P - s = ¼V /*4
4p - 4s = V
V = 4p - 4s
[tex]P=s+\frac{1}{4}V\\\\\frac{1}{4}V=P-s \ \ |\cdot4\\\\\boxed{V=4P-4s}[/tex]