One day, Anya runs 12 km at a speed of $$\(x \mathrm{~km} / \mathrm{h}\)$$. The next day she walks 10 km at a speed of $$\((x-4) \mathrm{km} / \mathrm{h}\)$$. Write down an expression, in terms of $$\(x\)$$, for the time she spends running. h

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