Question

tìm x : -2/3.( 4/5-2/3)+x = 4.(x-1/2)

Answer 1

=>-2/3x2/15+x=4x-2

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

=>-3x=-2+4/15=-26/15

hay x=26/45

Answer 2

`-2/3.( 4/5-2/3)+x = 4.(x-1/2)`

`-2/3.( 4/5-2/3)+x = 4x-2`

`-2/3 . (12/15 - 10/15) +x=4x-2`

`-2/3 .2/15 +x = 4x-2`

`-4/45 +x=4x-2`

`4/45 - x = 4x-2`

`x-4x = -2 + 4/45`

`-3x = -86/45`

`x=-86/45:(-3)`

`x=86/45 . 1/3`

`x=86/135`

Vậy `x=86/135`