Question

Tìm x biết: 

a)\(\dfrac{-2}{3}x=\dfrac{4}{15}\)                                        b) \(\dfrac{-7}{19}x=\dfrac{-13}{24}\)

Answer 1

x=\(\dfrac{4}{15}\) : \(\dfrac{-2}{3}\)

x=\(\dfrac{-2}{5}\)

Answer 2

a: Ta có: \(x\cdot\dfrac{-2}{3}=\dfrac{4}{15}\)

\(\Leftrightarrow x=\dfrac{4}{15}:\dfrac{-2}{3}=\dfrac{4}{15}\cdot\dfrac{-3}{2}=\dfrac{-2}{5}\)

b: Ta có: \(x\cdot\dfrac{-7}{19}=\dfrac{-13}{24}\)

\(\Leftrightarrow x=\dfrac{13}{24}:\dfrac{7}{19}=\dfrac{247}{168}\)