Respuesta :
[tex]( \frac{3}{10} + \frac{12}{4} ) \div ( \frac{13}{9} - \frac{4}{8} )[/tex]
[tex]( \frac{6 + 60}{20} ) \div ( \frac{104 - 36}{72} )[/tex]
[tex]( \frac{60}{20} ) \div ( \frac{68}{72} )[/tex]
[tex] (\frac{3}{1}) \div ( \frac{68}{72} )[/tex]
[tex]3 \times \frac{72}{68} [/tex]
[tex] \frac{216}{68} = \frac{108}{34} = \frac{54}{17} [/tex]
[tex] \frac{54}{17} \: o \: 3.176 \: o \: 3 \frac{3}{17} [/tex]
Espero haberte ayudado. Suerte en los estudios ≧◠◡◠≦.