Question

\(\dfrac{x-3}{15}\)=\(\dfrac{-2}{5}\) Tìm x

Answer 1

\(\dfrac{x-3}{15}=\dfrac{-2}{5}\\ \Rightarrow5\cdot\left(x-3\right)=\left(-2\right)\cdot15\\ \Rightarrow5x-15=-30\\ \Rightarrow5x=-30+15\\ \Rightarrow5x=-15\\ \Rightarrow x=-\dfrac{15}{5}=-3\)

Answer 2

`(x-3)/15 = -2/5`

`=> 5(x-3) = (-2)*15`

`=> 5x - 15 = -30`

`=> 5x = -30 +15`

`=> 5x = -15`

`=> x =-15: 5`

`=> x =-3`

Vậy `x=-3`

Answer 3

x - 3/15 = (-2)/5`