Question

Answer 1

=>-2/3x=1/4-1/5=1/20

=>x=-1/20:2/3=-1/20x3/2=-3/40

Answer 2

`-(2)/(3).x+0,2=(-(1)/(2))^{2}`

`=>-(2)/(3)x+(2)/(10)=(1)/(4)`

`=>-(2)/(3)x=(1)/(4)-(2)/(10)=(5)/(20)-(4)/(20)`

`=>-(2)/(3)x=1/20`

`=>x=(1)/(20):(-(2)/(3))=(1)/(20).(-(3)/(2))`

`=>x=-3/40`

Answer 3

\(\dfrac{-2}{3}.x+0,2=\left(\dfrac{-1}{2}\right)^2\)

=>\(\dfrac{-2}{3}.x+0,2=\dfrac{1}{4}\)

=>\(\dfrac{-2}{3}.x=\dfrac{1}{4}-0,2\)

=>\(\dfrac{-2}{3}.x=\dfrac{1}{20}\)

=>\(x=\dfrac{1}{20}:\dfrac{-2}{3}\)

=>x=\(\dfrac{-3}{40}\)

Vậy x=-3/40