https://tex.z-dn.net/?f=1%2B%5Cfrac%7B8%7D%7B1%2B%5Cfrac%7B8%7D%7B1-%5Cfrac%7B8%7D%7B1%2B%5Cfrac%7B4%7D%7B1-%5Cfrac%7B4%7D%7B1-%5Cfrac%7B8%7D%7Bx%7D%7D%7D%7D%7D%7D%7D%3D1993%5C%5C%0A%5C%5C%0A1%29+1-%5Cfrac%7B4%7D%7B1-%5Cfrac%7B8%7D%7Bx%7D%7D%7D%3D1-%5Cfrac%7B4x%7D%7Bx-8%7D%3D%5Cfrac%7B-3x-8%7D%7Bx-8%7D%5C%5C%0A2%291%2B%5Cfrac%7B4%7D%7B%5Cfrac%7B-3x-8%7D%7Bx-8%7D%7D%3D%5Cfrac%7B-3x-8%2B4x-32%7D%7B-3x-8%7D+%3D+%5Cfrac%7Bx-40%7D%7B-3x-8%7D%5C%5C%0A3%29++1-%5Cfrac%7B8%7D%7B%5Cfrac%7Bx-40%7D%7B-3x-8%7D%7D%3D%5Cfrac%7Bx-40-8%28-3x-8%29%7D%7Bx-40%7D%3D%5Cfrac%7B25x%2B24%7D%7Bx-40%7D%5C%5C%0A4%29+1%2B%5Cfrac%7B8%7D%7B%5Cfrac%7B25x%2B24%7D%7Bx-40%7D%7D++%3D%5Cfrac%7B25x%2B24%2B8x-320%7D%7B25x%2B24%7D+%3D%5Cfrac%7B33x-296%7D%7B25x%2B24%7D%5C%5C%0A5%29+1%2B%5Cfrac%7B8%7D%7B%5Cfrac%7B33x-296%7D%7B25x%2B24%7D%7D+%3D+1993%5C%5C%0A+%5Cfrac%7B33x-296%2B200x%2B192%7D%7B33x-296%7D%3D1993%5C%5C%0A+x%3D9%0A