- Если $$B = 5\frac{1}{2}$$, то $$x = B + 5\frac{3}{4} = 5\frac{1}{2} + 5\frac{3}{4} = \frac{11}{2} + \frac{23}{4} = \frac{22}{4} + \frac{23}{4} = \frac{45}{4} = 11\frac{1}{4}$$
- Если $$B = 3\frac{13}{16}$$, то $$x = B + 5\frac{3}{4} = 3\frac{13}{16} + 5\frac{3}{4} = \frac{61}{16} + \frac{23}{4} = \frac{61}{16} + \frac{92}{16} = \frac{153}{16} = 9\frac{9}{16}$$
- Если $$B = 0$$, то $$x = B + 5\frac{3}{4} = 0 + 5\frac{3}{4} = 5\frac{3}{4}$$
Ответ: $$x = 11\frac{1}{4}; x = 9\frac{9}{16}; x = 5\frac{3}{4}$$