a)<=>10+15(3x-3,7)=-5,3

<=>10+45x-55,5=-5,3

<=>45x-45,5=-5,3

<=>45x=40,2

<=>x=\(\frac{40,2}{45}\)

b)

a,x.3\(\dfrac{1}{4}\)+(\(\dfrac{-7}{6}\)).x-1\(\dfrac{2}{3}\)=\(\dfrac{5}{12}\)

\(\Leftrightarrow\)\(\dfrac{13}{4}\)x+(\(\dfrac{-7}{6}\))x-\(\dfrac{5}{3}\)=\(\dfrac{5}{12}\)

\(\Leftrightarrow\)\(\dfrac{13}{4}\)x+(\(\dfrac{-7}{6}\))x=\(\dfrac{25}{12}\)

\(\Leftrightarrow\)\(\dfrac{25}{12}\)x=\(\dfrac{25}{12}\)

\(\Leftrightarrow\)x=1

Vậy x=1

b,\(\dfrac{2}{5}\)+\(\dfrac{3}{5}\).(3x-3,7)=\(\dfrac{-53}{10}\)

\(\Leftrightarrow\)\(\dfrac{3}{5}\).(3x-3,7)=\(\dfrac{-53}{10}\)-\(\dfrac{2}{5}\)

\(\Leftrightarrow\)\(\dfrac{9}{5}\)x-\(\dfrac{111}{50}\)=\(\dfrac{-57}{10}\)

\(\Leftrightarrow\)\(\dfrac{9}{5}\)x=\(\dfrac{-87}{25}\)

\(\Leftrightarrow\)x=\(\dfrac{-29}{15}\)

Vậy x=\(\dfrac{-29}{15}\)

c,\(\dfrac{7}{9}\):(2+\(\dfrac{3}{4}\)x)+\(\dfrac{5}{9}\)=\(\dfrac{23}{27}\)

\(\Leftrightarrow\)\(\dfrac{7}{9}\):(2+\(\dfrac{3}{4}\)x)=\(\dfrac{8}{27}\)

\(\Leftrightarrow\)\(\dfrac{7}{18}\)+\(\dfrac{28}{27}\)x=\(\dfrac{8}{27}\)

\(\Leftrightarrow\)\(\dfrac{28}{27}\)x=\(\dfrac{-5}{54}\)

\(\Leftrightarrow\)x=\(\dfrac{-5}{56}\)

Vậy x=\(\dfrac{-5}{56}\)

Phạm Trí Tùng bạn làm đúng

4.x=29/12;-29/12

Câu cuối ban viết rõ lên nhé

a) 2/3*x-3/2*x=5/12

x*(2/3-3/2)=5/12

x*(-5/6)=5/12

x=5/12:(-5/6)

x=-1/2

b)2/5+3/5*(3x-3,7)=-53/10

3/5*(3x-3,7)=(-53/10)-2/5=-57/10

(3x-3,7)=(-57/10):3/5=-19/2

3x=(-19/2)+3,7

3x=-29/5

x=(-29/5):3=-29/15

c) 7/9:(2+3/4*x)+5/9=23/27

7/9:(2+3/4*x)=8/27

2+3/4*x=21/8

3/4*x=5/8

x=5/6

k mình nha

a) 2/3.x-3/2.x=5/12

   x.(2/3-3/2) =5/12

   x.-5/6       =5/12

   x             =5/12:-5/6

   x             =1/2

b)2/5+3/5.(3x-3,7)=-53/10

          3/5.(3x-3,7)=-53/10-2/5

          3/5.(3x-3,7)=-57/10

                3x-3,7    =-57/10:3/5

                3x-3,7     =-19/2

                3x          =--19/2+3,7

                3x          =-29/5

                 x           =-29/5:3

                 x           =29/15

c)7/9:(2+3/4.x)+5/9=23/27

  7/9:(2+3/4.x)        =23/27-5/9

 7/9:(2+3/4.x)         =28/27

        2+3/4.x         =7/9:28/27

        2+3/4.x         =3/4

           3/4.x          =3/4-2

           3/4.x          =-5/4

                x          =-5/4:3/4

                x           =-5/3

a: =>|x+3/4|=2+1/5=11/5

=>x+3/4=11/5 hoặc x+3/4=-11/5

=>x=29/20 hoặc x=-59/20

b: (x+1/2)(2/3-2x)=0

=>x+1/2=0 hoặc 2/3-2x=0

=>x=-1/2 hoặc x=1/3

c: =>|2x-1/3|=1/6

=>2x-1/3=1/6 hoặc 2x-1/3=-1/6

=>2x=1/2 hoặc 2x=1/6

=>x=1/4 hoặc x=1/12

e: =>x+2/3=0 hoặc -2x-3/5=0

=>x=-2/3 hoặc x=-3/10

a) \(\frac{2}{5}+\frac{3}{5}.\left(3x-3,7\right)=\frac{-53}{10}\)

=> \(\frac{3}{5}.\left(3x-3,7\right)=\frac{-53}{10}-\frac{2}{5}\)

=> \(\frac{3}{5}.\left(3x-3,7\right)=\frac{-57}{10}\)

=> \(\left(3x-3,7\right)=\frac{-19}{5}\)

=>\(3x=\frac{-19}{5}+\frac{37}{10}\)

=>\(3x=\frac{-1}{10}\)

=>\(x=\frac{-1}{30}\)

Ko biết đúng hay sai!!?