Question

Calcule 7/9 + 5/7 = 1/8

Answer 1

Resposta:

-31/504

Explicação passo-a-passo:

$\frac{7}{9} - \frac{5}{7} - \frac{1}{8} = \\ \frac{7}{9} - \frac{5}{7} = \frac{49 - 45}{63} = \frac{4}{63} \\ \frac{4}{63} - \frac{1}{8} = \frac{32 - 63}{504} \\ = - \frac{31}{504}$