Question

tìm số chưa biết 

-2/3 = 18/x

giúp mình nhé , cảm ơn

 

Answer 1

\(\dfrac{-2}{3}=\dfrac{18}{x}\\ \Rightarrow x=18:\dfrac{-2}{3}\\ \Rightarrow x=-27\)

Answer 2

-2/3 = 18/x

Vậy x = 18 : 2 x 3

       x = 27

Answer 3

\(\dfrac{-2}{3}=\dfrac{18}{x}\)

\(\Leftrightarrow-2x=3\times18\)

\(\Leftrightarrow-2x=54\)

\(\Leftrightarrow x=54\div\left(-2\right)\)

\(\Leftrightarrow x=-27\)

Vậy \(x=-27\)