Question

1/3×(3x-2)-1/4=-9/6

Answer 1

`1/3×(3x-2)-1/4=-9/6`

`=>1/3×(3x-2)=-3/2 +1/4`

`=>1/3×(3x-2)= -6/4 +1/4`

`=>1/3×(3x-2)=-5/4`

`=> 3x-2=-5/4 : 1/3`

`=> 3x-2=-5/4 xx 3`

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

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

`=> 3x=-15/4 +8/4`

`=> 3x= -7/4`

`=>x=-7/4 : 3`

`=>x=-7/4 xx 1/3`

`=>x=-7/12`

Answer 2

\(\dfrac{1}{3}\times\left(3x-2\right)-\dfrac{1}{4}=-\dfrac{9}{6}\)

\(\Leftrightarrow\dfrac{1}{3}\times\left(3x-2\right)=-\dfrac{9}{6}+\dfrac{1}{4}\)

\(\Leftrightarrow\dfrac{1}{3}\times\left(3x-2\right)=-\dfrac{5}{4}\)

\(\Leftrightarrow3x-2=-\dfrac{5}{4}:\dfrac{1}{3}\)

\(\Leftrightarrow3x-2=-\dfrac{15}{4}\)

\(\Leftrightarrow3x=-\dfrac{7}{4}\)

\(\Leftrightarrow x=-\dfrac{7}{12}\)

Answer 3

`1/3x×(3x-2)-1/4=-9/6`

`1/3xx(3x-2)=-9/6-1/4`

`1/3xx(3x-2)=-21/12`

`3x-2=-21/12:1/3`

`3x-2=-21/4`

`3x=-21/4+2`

`3x=-13/4`

`x=-13/4:3`

`x=-13/12`

Vậy `x=-13/12`

`@Nae`

Answer 4

Sửa lại bài :

`1/3x×(3x-2)-1/4=-9/6`

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

`1/3xx(3x-2)=-6/4+1/4`

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

`3x-2=-5/4:1/3`

`3x-2=5/4xx3`

`3x-2=-15/4`

`3x=-15/4+2`

`3x=-15/4+8/4`

`3x=-7/4`

`x=-7/4xx1/3`

`x=-7/12`

Vậy `x=-7/12`

`@Nae`