a) \(\dfrac{2}{3}x-\dfrac{1}{2}=\dfrac{1}{10}\)

\(\dfrac{2}{3}x=\dfrac{1}{10}+\dfrac{1}{2}=\dfrac{3}{5}\)

\(x=\dfrac{3}{5}:\dfrac{2}{3}=\dfrac{9}{10}\)

b) \(\dfrac{39}{7}:x=13\)

\(x=\dfrac{\dfrac{39}{7}}{13}=\dfrac{3}{7}\)

c) \(\left(\dfrac{14}{5}x-50\right):\dfrac{2}{3}=51\)

\(\dfrac{14}{5}x-50=51\cdot\dfrac{2}{3}=34\)

\(\dfrac{14}{5}x=34+50=84\)

\(x=\dfrac{84}{\dfrac{14}{5}}=30\)

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

\(\Leftrightarrow\left[{}\begin{matrix}x+\dfrac{1}{2}=0\\\dfrac{2}{3}-2x=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{1}{2}\\x=\dfrac{1}{3}\end{matrix}\right.\)

e) \(\dfrac{2}{3}x-\dfrac{1}{2}x=\dfrac{5}{12}\)

\(\dfrac{1}{6}x=\dfrac{5}{12}\)

\(x=\dfrac{5}{12}:\dfrac{1}{6}=\dfrac{5}{2}\)

g) \(\left(x\cdot\dfrac{44}{7}+\dfrac{3}{7}\right)\dfrac{11}{5}-\dfrac{3}{7}=-2\)

\(\left(x\cdot\dfrac{44}{7}+\dfrac{3}{7}\right)\cdot\dfrac{11}{5}=-2+\dfrac{3}{7}=-\dfrac{11}{7}\)

\(x\cdot\dfrac{44}{7}+\dfrac{3}{7}=-\dfrac{11}{7}:\dfrac{11}{5}=-\dfrac{5}{7}\)

\(\dfrac{44}{7}x=-\dfrac{5}{7}-\dfrac{3}{7}=-\dfrac{8}{7}\)

\(x=-\dfrac{8}{7}:\dfrac{44}{7}=-\dfrac{2}{11}\)

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

\(\dfrac{25}{12}x-\dfrac{5}{3}=\dfrac{5}{12}\)

\(\dfrac{25}{12}x=\dfrac{5}{12}+\dfrac{5}{3}=\dfrac{25}{12}\)

\(x=1\)

Mỏi tay woa bn làm nốt nha!!

các bn oi dau / nay la gia tri tuyet doi day

a) 13 - ( 2x - 11 ) = -15

=>       2x - 11    = 13 - ( -15 )

=>       2x - 11    = 28

=>      2x           = 28 + 11

=>     2x            = 39

=>      x            = 39 : 2

=>      x            = 19,5

Mấy câu khác bn tự giải nha!Cũng tương tự như vậy thôi!

a/ \(13-\left|2x-11\right|=-15\)

\(\Leftrightarrow\left|2x-11\right|=28\)

\(\Leftrightarrow\orbr{\begin{cases}2x-11=28\\2x-11=-28\end{cases}}\) 

\(\Leftrightarrow\orbr{\begin{cases}x=19,5\\x=-8,5\end{cases}}\)

Vậy ...

b/ \(17-\left(13-2x\right)=x+11\)

\(\Leftrightarrow17-13+2x=x+11\)

\(\Leftrightarrow5+2x=x+11\)

\(\Leftrightarrow2x-x=11-5\)

\(\Leftrightarrow x=6\)

Vậy ,,,

b/ \(17-\left|3x-2\right|=7\)

\(\Leftrightarrow\left|3x-2\right|=10\)

\(\Leftrightarrow\orbr{\begin{cases}3x-2=10\\3x-2=-10\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}3x=12\\3x=-8\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=4\\x=-\frac{8}{3}\end{cases}}\)

Vậy ...

d/ \(\left|4x\right|=2x+2\)

\(\Leftrightarrow\orbr{\begin{cases}2x+2=4x\\2x+2=-4x\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}2x-4x=2\\2x+4x=2\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}-2x=2\\6x=2\end{cases}}\)

\(\Leftrightarrow\orbr{\begin{cases}x=-1\\x=\frac{1}{3}\end{cases}}\)

a,\(\frac{-4}{3}\)

b,19

c,-24

d,6

e,3

a/ x – 6 = - 3

   x = -3 + 6 = 3

b/ 3x + 17 = 29

   3x = 29 - 17

    x  = 12 : 3 =4

c/ 2x + 11 = 15

   2x = 15 - 11

    x = 4 : 2 =2

\(a,x=\left(-3\right)+6=3\\ b,3x=29-17=12\\ x=12:3=4\\ c,2x=15-11=4\\ x=14:2=7\)

x - 6 = -3

x = - 3  + 6

x = 3

b ) 3x + 17 = 29

3x = 29 - 17

3x = 12

x = 12 : 3

x = 4

c/ 2x + 11 = 15

2x = 15 - 11

2x = 4

x = 4 : 2

x = 2

a) 17-(2x-11) = 12-3x

2x-11 = 17-12+3x

2x-11 = 5+3x

2x-3x = 5+11

-x = 16

x = -16

b, |2x-3|=7

=>2x-3=7 hoặc 2x-3=-7

=>2x=10 hoặc 2x=-4

=>x=5 hoặc x=-2

c, (2x-1)⁴ = 16

(2x-1)⁴ = 2⁴

2x-1=2

2x=3

x=3/2

d, (17-2x)³ = -125

(17-2x)³ = (-5)³

17-2x=-5

2x=17-(-5)

2x=22

x=11

a, => 17-2x+11 = 12-3x

=> 28-2x=12-3x

=> 28=12-3x+2x = 12-x

=> x=12-28 = -16

b, => 2x-3=7 hoặc 2x-3=-7

=> x=5 hoặc x=-2

c, => 2x-1=2 hoặc 2x-1=-2

=> x=3/2 hoặc x=-1.2

d, => 17-2x=-5

=> 2x=17-(-5) = 22

=> x=22:2 = 11

Tk mk nha

1) 3x-(4+2x)=11

    3x - 4 - 2x = 11

   3x - 2x = 11+4

     x = 15

Vậy x = 15.

2) 4x+5=11+2x

    4x - 2x = 11 - 5

    2x = 6

    x   = 6 : 2

     x  = 3

Vậy x  = 3.

3) 7x-17=31+x

    7x - x = 31  + 17

      6x = 48

        x = 48 : 6

       x  = 8

Vậy x = 8

# HOK TỐT #

\(3x-\left(4+2x\right)=11\)

\(3x-4-2x=11\)

\(x-15=0\)

\(x=15\)

\(4x+5=11+2x\)

\(2x-6=0\)

\(2x=6\)

\(x=3\)

Bn lm phần c đi , cố lên ! 

1) 3x-(4+2x)=11

    3x-4-2x=11

    3x-2x=11+4

          x=15

2) 4x+5=11+2x

    4x-2x=11-5

         2x=6

           x=6:2

           x=3

3) 7x-17=31+x

    7x-x=31+17

        6x=48

          x=48:6

          x=8

bạn có thể check lại đề bài câu a được không ạ

là x^2 = x^5 á bạn

\(\left(4-3x\right)\left(10x-5\right)=0\)

\(\Rightarrow\orbr{\begin{cases}4-3x=0\\10x-5=0\end{cases}\Rightarrow\orbr{\begin{cases}3x=4\\10x=5\end{cases}\Rightarrow}\orbr{\begin{cases}x=\frac{4}{3}\\x=\frac{1}{2}\end{cases}}}\)

\(\left(7-2x\right)\left(4+8x\right)=0\)

\(\Rightarrow\orbr{\begin{cases}7-2x=0\\4+8x=0\end{cases}\Rightarrow\orbr{\begin{cases}2x=7\\8x=-4\end{cases}\Rightarrow\orbr{\begin{cases}x=\frac{7}{2}\\x=-\frac{1}{2}\end{cases}}}}\)

rồi thực hiện đến hết ... 

Brainchild bé ngây thơ qus e , ko thực hiện đến hết như thế đc đâu :>

\(\left(x-3\right)\left(2x-1\right)=\left(2x-1\right)\left(2x+3\right)\)

\(2x^2-7x+3=4x^2+4x-3\)

\(2x^2-7x+3-4x^2-4x+3=0\)

\(-2x^2-11x+6=0\)

\(2x^2+11x-6=0\)

\(2x^2+12x-x-6=0\)

\(2x\left(x+6\right)-\left(x+6\right)=0\)

\(\left(x+6\right)\left(2x-1\right)=0\)

\(x+6=0\Leftrightarrow x=-6\)

\(2x-1=0\Leftrightarrow2x=1\Leftrightarrow x=\frac{1}{2}\)

\(3x-2x^2=0\)

\(x\left(2x-3\right)=0\)

\(x=0\)

\(2x-3=0\Leftrightarrow2x=3\Leftrightarrow x=\frac{3}{2}\)

Tự lm tiếp nha 

chiu lop 3 ma