Question

\(x:\dfrac{-3}{5}=\dfrac{-10}{21}\)

Answer 1

\(x:\dfrac{-3}{5}=\dfrac{-10}{21}\)

\(x=\dfrac{-10}{21}.\dfrac{-3}{5}\)

\(x=\dfrac{30}{105}=\dfrac{2}{7}\)

Answer 2

x : \(\dfrac{-3}{5}\) = \(\dfrac{-10}{21}\)

x = \(\dfrac{-10}{21}.\dfrac{-3}{5}\)

x = \(\dfrac{-10.\left(-3\right)}{21.5}\)

x = \(\dfrac{-2.\left(-1\right)}{7.1}\)

x = \(\dfrac{2}{7}\)

Chúc bạn học tốt

Answer 3

x :\(\dfrac{-3}{5}\)=\(\dfrac{-10}{21}\)

\(\Rightarrow x=\dfrac{-10}{21}\cdot\dfrac{-3}{5}\)

\(\Rightarrow x=\dfrac{-10\cdot\left(-3\right)}{21\cdot5}\)

Rút gọn, ta được:

\(x=\dfrac{-2\cdot\left(-1\right)}{7\cdot1}\)

\(\Rightarrow x=\dfrac{2}{7}\)

Answer 4

x : \(\dfrac{-3}{5}=\dfrac{-10}{21}\)

x \(=\dfrac{-10}{21}.\dfrac{-3}{5}\) Bấm máy tính cầm tay

x\(=\dfrac{2}{7}\)