Bonsoir,
L = [tex]\frac{-7}{5}+(\frac{4}{18}-\frac{7}{18}) = \frac{-7}{5}-\frac{3}{18}=\frac{-7}{5}-\frac{1}{6}=\frac{-42}{30}-\frac{5}{30}=\frac{-47}{30}[/tex]
M =
[tex](\frac{4}{5}+\frac{-3}{2})/(\frac{-9}{4}-\frac{1}{6}) = (\frac{8}{10}+\frac{-15}{10})/(\frac{-54}{24}-\frac{4}{24})=(\frac{-7}{10})/(\frac{-58}{24})= (\frac{-7}{10})\times(\frac{24}{-58})=\frac{-168}{-580}=\frac{168}{580}=\frac{42}{145}[/tex]
Bonne soirée!
