\(a,\Rightarrow4-\dfrac{4}{3}< x+\dfrac{1}{5}< \dfrac{86}{7}-\dfrac{27}{8}\\ \Rightarrow\dfrac{8}{3}< x+\dfrac{1}{5}< \dfrac{499}{56}\\ \Rightarrow\dfrac{37}{15}< x< \dfrac{2439}{280}\\ b,\Rightarrow2-\dfrac{7}{5}+\dfrac{1}{3}< x\\ \Rightarrow x>\dfrac{14}{15}\\ c,\Rightarrow x-\dfrac{8}{5}=\dfrac{13}{6}\cdot\dfrac{12}{13}=2\\ \Rightarrow x=\dfrac{18}{5}\)