a) \(\frac{304}{60}=\frac{9}{135}-x\)
\(\Rightarrow x=\frac{9}{135}-\frac{304}{60}\)
\(\Rightarrow x=-5\).
Vậy \(x=-5.\)
b) \(\frac{-1}{2}+\frac{16}{124}+x-\frac{5}{31}=\frac{2}{62}\)
\(\Rightarrow\frac{-1}{2}+\frac{4}{31}+x-\frac{5}{31}=\frac{1}{31}\)
\(\Rightarrow\frac{-1}{2}+x=\frac{1}{31}-\frac{4}{31}+\frac{5}{31}\)
\(\Rightarrow\frac{-1}{2}+x=\frac{2}{31}\)
\(\Rightarrow x=\frac{2}{31}-\frac{-1}{2}\)
\(\Rightarrow x=\frac{35}{62}\)
Vậy \(x=\frac{35}{62}\)
c) \(\frac{2}{17}+\frac{15}{24}-\frac{15}{27}-x-\frac{8}{23}=0\)
\(\Rightarrow\left(\frac{2}{17}+\frac{5}{8}-\frac{5}{9}\right)-x=\frac{8}{23}\)
\(\Rightarrow\frac{229}{1224}-x=\frac{8}{23}\)
\(\Rightarrow x=\frac{229}{1224}-\frac{8}{23}\)
\(\Rightarrow x=\frac{-4525}{28152}\)
Vậy \(x=\frac{-4525}{28152}\)
\(\Rightarrow x=\frac{385}{186}\).
