e) \(-\dfrac{4}{7}-x=\dfrac{3}{5}-2x\)

\(-\dfrac{4}{7}-x+2x=\dfrac{3}{5}\)

\(-\dfrac{4}{7}+x=\dfrac{3}{5}\)

\(x=\dfrac{3}{5}+\dfrac{4}{7}\)

\(x=\dfrac{21}{35}+\dfrac{20}{35}\)

\(x=\dfrac{41}{35}\)

Tìm x

\(\dfrac{\left(-2\right)^{x-1}}{18}=\dfrac{8}{9}\)

câu c tương tự :)