7+2x=-37-(-26)-x

7+2x=-11-x

7+2x+x=-11

7+3x=-11

3x=-11-7

3x=-18 

x=-18:3

x=-6

-7 - 2x = 962 

-2x = 969

x = -484,5

7 - 2x = 962 

-2x = 969

x = -484,5

\(7+2x=-37-\left(-26\right)-x\)

\(7+2x=-11-x\)

 \(2x+x=-11-7\)

         \(3x=-18\)

           \(x=\left(-18\right):3\)

           \(x=-6\)

Vậy \(x=-6\)

7+2x=-37-(-26)-x

7+2x=-11-x

7+2x+x=-11

7+3x=-11

3x=-11-7

3x=-18

x=-18:3

x=-6

*) \(-7+2x=-37-\left(-26\right)\)

⇔ \(-7+2x=-11\)

⇔ \(2x=\left(-11\right)-\left(-7\right)\)

⇔ \(2x=-4\)

⇔ \(x=\left(-4\right):2\)

⇔ \(x=-2\)

\(\text{(3x +9).(11-x ) =0}\)

⇔\(\left[{}\begin{matrix}3x+9=0\\11=x=0\end{matrix}\right.\)⇔\(\left[{}\begin{matrix}3x=-9\\x=11\end{matrix}\right.\)⇔\(\left[{}\begin{matrix}x=-3\\x=11\end{matrix}\right.\)

Vậy x= -3 và x= 11

⇔⇔⇔

Vậy x= -3 và x= 11

2x - 15 = -11 - ( -16 )

2x - 15 = -11 + 16 

2x - 15 = 5

2x         = 5 + 15 

2x         = 20

   x        = 20 : 1 

   x        = 10 

Vậy x = 10

7 - 2x = -37 - ( -26 )

7 - 2x = -37 + 26

7 - 2x = -11

      2x = 7 - ( - 11 )

      2x = 7+ 11

      2x = 18

        x = 18 : 2 

        x = 9

Vậy x = 9 

| x + 7 | = 9 

TH1 :

x + 7 = 9

=> x  = 9 - 7 

=> x  = 2    

TH2 :

x - 7 = -9

=> x  = -9 - 7

=> x  = - 9 + ( -7 )

=> x   = -16 

Vậy x = 2 và x = -16

Câu cuối bn tự làm nha! ^-^

2x-15=-11-(-16)

2x-15= -11+16

2x-15=5

2x=5+15

2x=20

x=20:2

x=10

\(2x-15=-11-\left(-16\right)\)

\(\Leftrightarrow2x-15=5\)

\(\Leftrightarrow2x=5+15\)

\(\Leftrightarrow2x=20\)

\(\Leftrightarrow x=20\div2\)

\(\Leftrightarrow x=10\)

\(-7-2x=-37-\left(-26\right)\)

\(\Leftrightarrow-7-2x=-11\)

\(\Leftrightarrow2x=-7+11\)

\(\Leftrightarrow2x=4\)

\(\Leftrightarrow x=\frac{4}{2}\)

\(\Leftrightarrow x=2\)

a) x - 12 - 2x - 32 = -11

-x - 44 = -11

-x  = 33

x = -33 

a/ (x-12)-(2x+31)=-6-5

    x-12-2x-31=-11

    -x=(-11)+43

-x=32

=> x=-32

a/ (x-12)-(2x+31)=-6-5

    x-12-2x-31=-11

    -x=(-11)+43

-x=32

=> x=-32

\(-7+2x=-37-\left(-26\right)\)

\(\Leftrightarrow-7+2x=-37+26\)

\(\Leftrightarrow2x=-37+26+7\)

\(\Leftrightarrow2x=-4\)

\(\Leftrightarrow x=-2\)

\(-7+2x=-37-\left(-26\right)\)

\(-7+2x=-11\)

\(2x=-11-\left(-7\right)\)

\(2x=-4\)

\(\Leftrightarrow x=-2\)

- 7 + 2x = -37 - ( - 26 )

- 7 + 2x = -37 + 26

- 7 + 2x = - 11

         2x = - 11 - ( - 7 )

         2x = - 11 + 7

         2x = - 4

           x = - 4 : 2

           x = - 2

x- 26-78 = 76-58

x-26-78 =18

x-26= 18+78

x-26=96

x= 96+26

x=122

đáp số x=122

cậu làm sai rồi 26 - 37 = 76 - 58

x - 26 - 37 = 18

x - 26 = 18+37

x        = 55 + 26

x        = 81

-7-2x = 37-(-26)

Suy ra -7-2x=11

Suy ra -2x=11-7

Suy ra -2x=4

Suy ra 2x= -4

Suy ra x = -4 :2 =-2