Explicación paso a paso:
[tex] \frac{3}{1} - \frac{1}{2} + \frac{5}{4} + \frac{3}{8} = x \\ \frac{3}{1} = 3 \\ \frac{3}{1} - \frac{1}{2} = 2 \frac{1}{2} \\ \frac{5}{4} = 1 \frac{1}{4} \\ 2 \frac{1}{2} + 1 \frac{1}{4} = 3 \frac{3}{4} \\ 3 \frac{3}{4} = \frac{30}{8} \\ \frac{30}{8} + \frac{3}{8} = \frac{38}{8} = 4 \frac{6}{8} = 4 \frac{3}{4} [/tex]
