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2 tháng 4 2017

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)=8/27

2+3/4.x=7/9:8/27

2+3/4.x=21/8

3/4.x=21/8-2

3/4.x=5/8

X=5/8:3/4

X=5/6

27 tháng 7 2016

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{5}{9}\)

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)=\frac{8}{27}\)

\(2+\frac{3}{4}x=\frac{7}{9}\div\frac{8}{27}\)

\(2+\frac{3}{4}x=\frac{21}{8}\)

\(\frac{3}{4}x=\frac{21}{8}-2\)

\(\frac{3}{4}x=\frac{5}{8}\)

\(x=\frac{5}{8}\div\frac{3}{4}\)

\(x=\frac{5}{6}\)

Chúc bạn học tốt ^^

27 tháng 7 2016

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{5}{9}\)

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{8}{27}\)

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

\(2+\frac{3}{4}x=\frac{21}{8}\)

\(\frac{3}{4}x=\frac{21}{8}-2\)

\(\frac{3}{4}x=\frac{5}{8}\)

\(x=\frac{5}{8}:\frac{3}{4}\)

\(x=\frac{5}{6}\)

30 tháng 7 2016

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{5}{9}\)

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{8}{27}\)

\(\left(2+\frac{3}{4}x\right)=\frac{7}{9}:\frac{8}{27}\)

\(\left(2+\frac{3}{4}x\right)=\frac{7}{9}.\frac{27}{8}\)

\(\left(2+\frac{3}{4}x\right)=\frac{21}{8}\)

\(\frac{3}{4}x=\frac{21}{8}-2\)

\(\frac{3}{4}x=\frac{5}{8}\)

\(x=\frac{5}{8}:\frac{3}{4}\)

\(x=\frac{5}{8}.\frac{4}{3}\)

\(x=\frac{5}{6}\)

30 tháng 7 2016

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{5}{9}\)

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)=\frac{8}{27}\)

\(2+\frac{3}{4}x=\frac{7}{9}\div\frac{8}{27}\)

\(2+\frac{3}{4}x=\frac{21}{8}\)

\(\frac{3}{4}x=\frac{21}{8}-2\)

\(\frac{3}{4}x=\frac{5}{8}\)

\(x=\frac{5}{8}\div\frac{3}{4}\)

\(x=\frac{5}{6}\)

 

4 tháng 10 2021

yutyugubhujyikiu

11 tháng 4 2018

MF MAF:

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{5}{9}\)

\(\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{15}{27}\)

        \(\left(2+\frac{3}{4}x\right)=\frac{7}{9}:\frac{8}{27}\)

                    \(\frac{3}{4}x=\frac{21}{8}-\frac{16}{8}\)  

                     \(\frac{3}{4}x=\frac{5}{8}\)              

                            \(x=\frac{5}{8}:\frac{3}{4}\)

                            \(x=\frac{5}{6}\)

Vậy x = 5/6

Tham khảo nha ~~

11 tháng 4 2018

lớp 5 hả bạn

11 tháng 2 2017

a. \(\frac{7}{9}:\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

\(\Rightarrow\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{5}{9}\)

\(\Rightarrow\frac{7}{9}:\left(2+\frac{3}{4}x\right)=\frac{8}{27}\)

\(\Rightarrow2+\frac{3}{4}x=\frac{7}{9}:\frac{8}{27}\)

\(\Rightarrow2+\frac{3}{4}x=\frac{21}{8}\)

\(\Rightarrow\frac{3}{4}x=\frac{21}{8}-2\)

\(\Rightarrow\frac{3}{4}x=\frac{5}{8}\)

\(\Rightarrow x=\frac{5}{8}:\frac{3}{4}\)

\(\Rightarrow x=\frac{5}{6}\)

b. \(\frac{-2}{3}x+\frac{1}{5}=\frac{3}{10}\)

\(\Rightarrow\frac{-2}{3}x=\frac{3}{10}-\frac{1}{5}\)

\(\Rightarrow\frac{-2}{3}x=\frac{1}{10}\)

\(\Rightarrow x=\frac{1}{10}:\left(\frac{-2}{3}\right)\)

\(\Rightarrow x=\frac{-3}{20}\)

c. \(\left|x\right|-\frac{3}{4}=\frac{5}{3}\)

\(\Rightarrow\left|x\right|=\frac{5}{3}+\frac{3}{4}\)

\(\Rightarrow\left|x\right|=\frac{29}{12}\)

\(\Rightarrow x=\frac{29}{12}\) hoặc \(x=-\frac{29}{12}\)

11 tháng 4 2018

LON CAU HOI

12 tháng 4 2017

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

12 tháng 4 2017

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

10 tháng 6 2020

c) \(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)+\frac{5}{9}=\frac{23}{27}\)

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{5}{9}\)

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)=\frac{23}{27}-\frac{15}{27}\)

\(\frac{7}{9}\div\left(2+\frac{3}{4}x\right)=\frac{8}{27}\)

\(2+\frac{3}{4}x=\frac{7}{9}\div\frac{8}{27}\)

\(2+\frac{3}{4}x=\frac{7}{9}.\frac{27}{8}\)

\(2+\frac{3}{4}x=\frac{21}{8}\)

\(\frac{3}{4}x=\frac{21}{8}-2\)

\(\frac{3}{4}x=\frac{21}{8}-\frac{16}{8}\)

\(\frac{3}{4}x=\frac{5}{8}\)

\(x=\frac{5}{8}\div\frac{3}{4}\)

\(x=\frac{5}{8}.\frac{4}{3}\)

\(x=\frac{5}{6}\)

Vậy \(x=\frac{5}{6}\).

d) \(\left|x-\frac{1}{3}\right|-\frac{3}{4}=\frac{5}{3}\)

\(\left|x-\frac{1}{3}\right|=\frac{5}{3}+\frac{3}{4}\)

\(\left|x-\frac{1}{3}\right|=\frac{20}{12}+\frac{9}{12}\)

\(\left|x-\frac{1}{3}\right|=\frac{29}{12}\)

\(\Rightarrow\orbr{\begin{cases}x-\frac{1}{3}=\frac{29}{12}\\x-\frac{1}{3}=-\frac{29}{12}\end{cases}}\Rightarrow\orbr{\begin{cases}x=\frac{11}{4}\\x=-\frac{25}{12}\end{cases}}\)

Vậy \(x\in\left\{\frac{11}{4};-\frac{25}{12}\right\}\).

3 tháng 5 2015

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

7/9:(2+3/4x)=23/27-15/27

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

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

2+3/4x=21/8

3/4x=21/8-2

3/4x=21/8-16/8

3/4x=5/8

x=5/8:3/4

x=5/6

Một đ ú n g nha..............