\[x - y = 5:\]
\[\frac{(2x - 2y)^{2}}{12,5} = \frac{4 \cdot (x - y)^{2}}{12,5} = \frac{4 \cdot 5^{2}}{12,5} =\]
\[= \frac{4 \cdot 25}{12,5} = \frac{4}{0,5} = \frac{40}{5} = 8.\]