Salut,
[tex]1 \frac{5}{7} - ( \frac{11}{4} - \frac{3}{28} ) = \\ \\ \frac{12}{7} - ( \frac{^{7)} 11}{ \: \: 4} - \frac{ ^{1)} 3 }{ \: \: \: \: 28} ) = \\ \\ \frac{12}{7} - ( \frac{77}{28} - \frac{3}{28} ) = \\ \\ \frac{ ^{4)} 12}{ \: \: \: 7} - \frac{ ^{1)} 74}{ \: \: \: 28} = \\ \\ \frac{48}{28} - \frac{74}{28} = \\ \\ - \frac{ ^{2)} 26}{ \: \: \: 28} = \boxed{\bold{ - \frac{13}{14} }} [/tex]
