Question

  Giải hộ

Answer 1

a ) 1 - 3x = \(\dfrac{-2}{3}\)

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

          3x = 1 + \(\dfrac{2}{3}\)

          3x = \(\dfrac{5}{3}\)

            x = \(^{\dfrac{5}{3}}\) : 3

            x = \(\dfrac{5}{3}\) . \(\dfrac{1}{3}\) 

            x = \(\dfrac{5}{9}\)

b) 2x - 1 = \(\dfrac{1}{4}\) + ( - 2 )
    2x - 1 = \(\dfrac{-7}{4}\)

    2x      = \(\dfrac{-7}{4}\) + 1

    2x = \(\dfrac{-3}{4}\) 

      x = \(\dfrac{-3}{4}\) : 2

       x = \(\dfrac{-3}{8}\)

Answer 2

a: =>3x=1+2/3=5/3

=>x=5/3:3=5/9

b: =>2x-1=1/4-2=-7/4

=>2x=-7/4+1=-3/4

=>x=-3/8