Bài 5:
a: \(x=\dfrac{1}{5}+\dfrac{2}{3}=\dfrac{3+10}{15}=\dfrac{13}{15}\)
b: \(\Leftrightarrow2x=\dfrac{-2}{5}-\dfrac{3}{2}=\dfrac{-4-15}{10}=\dfrac{-19}{10}\)
=>x=-19/20
Bài 6:
=>3/5x=-1/4-2/5=-5/20-8/20=-13/20
=>x=-13/20:3/5=-13/20*5/3=-65/60=-13/12