Respuesta :
a)
[tex]\frac{5}{7} + \frac{1}{8} = \frac{40+7}{56} = \frac{47}{56} [/tex]
b)
[tex]\frac{3}{8} + x = \frac{1}{2} x = \frac{1}{2} - \frac{3}{8} = \frac{4-3}{8} = \frac{1}{8}[/tex]
[tex]\frac{5}{7} + \frac{1}{8} = \frac{40+7}{56} = \frac{47}{56} [/tex]
b)
[tex]\frac{3}{8} + x = \frac{1}{2} x = \frac{1}{2} - \frac{3}{8} = \frac{4-3}{8} = \frac{1}{8}[/tex]