One day, Anya runs 12 km at a speed of $$\(x \mathrm{~km} / \mathrm{h}\)$$. The next day she walks 10 km at a speed of $$\((x-4) \mathrm{km} / \mathrm{h}\)$$. The time Anya spends walking is 1 hour more than the time she spends running. Write an equation in terms of $$\(x\)$$ and show that it simplifies to $$\(x^{2}-2 x-48=0\)$$.

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