Question

TỈ lệ thức x/27=-5/9 suy ra

Answer 1

`x/27 =-5/9`

`=> 9x=27.(-5)`

`=>9x= -135`

`=>x=-135:9`

`=>x= -15`

Answer 2

\(\dfrac{x}{27}=-\dfrac{5}{9}\)

Suy ra :

\(9\times x=-5\times27\)

\(\Leftrightarrow9\times x=-135\)

\(\Leftrightarrow x=-135:9\)

\(\Leftrightarrow x=-15\)

Answer 3

lớp 1 này nó lạ lắm:))

\(\dfrac{x}{27}=-\dfrac{5}{9}\\ \Rightarrow x=27\cdot\left(-\dfrac{5}{9}\right)\\ x=3\cdot\left(-5\right)=-15\)

Answer 4

\(\dfrac{x}{27}=-\dfrac{5}{9}\)

➩ \(x=\dfrac{27\cdot\left(-5\right)}{9}\)

\(x=-15\)

Answer 5

2/9+x=1

Answer 6

Hai phần chín+x=1

Answer 7

`x/27 = -5/9`

`=>x = (27.(-5))/9 = -15`

Vậy `x=-15`