Question

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

Answer 1

x = \(\dfrac{-15.4}{2}=\dfrac{-60}{2}=-30\)

Answer 2

\(-\dfrac{15}{x}=\dfrac{2}{4}\Leftrightarrow x=\dfrac{15.4}{2}=30\)

Answer 3

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

\(\Rightarrow-15.4=2x\Rightarrow-15.4:2=x=-30\)

Answer 4

\(\dfrac{2}{4}\)=\(\dfrac{1}{2}\)=\(\dfrac{15}{30}\)=\(\dfrac{-15}{-30}\)

=> x=-30

Answer 5

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

Sử dụng tính chất hai phân số bằng nhau ( Sử dụng tích chéo ) ta được \(:\)

\(-15.4=2x\)

Viết lại :

\(2x=-15.4\)

\(\xrightarrow[]{}\) \(2x=-60\)

\(\xrightarrow[]{}\) \(x=\dfrac{-60}{2}\)

\(\xrightarrow[]{}\) \(x=-30\)

Vậy \(:\) \(\dfrac{-15}{x}=\dfrac{2}{4}\)  khi \(x=-30\)

Answer 6

=>-15.4=x.2

=>2.x=-60

=>x=-60:2=-30