Question

x - 2 1/2 x = 15/4

Answer 1

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

\(=>x-\dfrac{5}{2}x=\dfrac{15}{4}\)

\(=>x\left(1-\dfrac{5}{2}\right)=\dfrac{15}{4}\)

\(=>x.\dfrac{-3}{2}=\dfrac{15}{4}\)

\(=>x=\dfrac{15}{4}.\dfrac{-2}{3}\)

\(=>x=\dfrac{-5}{2}\)

Vậy..

# Wendy Dang

Answer 2

=>x-2,5x=3,75

=>-1,5x=3,75

=>x=-2,5

Answer 3

`x -2 1/2 x = 15/4`

`=> x- 5/2x=15/4`

`=> (1-5/2)x=15/4`

`=> -3/2 x=15/4`

`=> x= 15/4 : (-3/2)`

`=> x= 15/4 xx (-2/3)`

`=> x= -30/12=-15/6`