Bài 3:
a: \(\Leftrightarrow x=-\dfrac{2}{3}-\dfrac{1}{15}=\dfrac{-10}{15}-\dfrac{1}{15}=-\dfrac{11}{15}\)
b: \(\Leftrightarrow x=-\dfrac{8}{5}+\dfrac{1}{4}=\dfrac{-32+5}{20}=-\dfrac{27}{20}\)
c: \(\Leftrightarrow x=\dfrac{1}{5}-\dfrac{1}{25}=\dfrac{5}{25}-\dfrac{1}{25}=\dfrac{4}{25}\)
d: \(\Leftrightarrow x=0+\dfrac{7}{15}=\dfrac{7}{15}\)