***a, 14+2x=-32

        2x=-32-14

        2x=-46

          x=-46/2

         x=-23

        Vậy x=-23

ko biết ahihi

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xy+x+y=2

xy+x+y+1=2+1

(xy+x)+(y+1)=3

x(y+1)+(y+1)=3

(x+1)(y+1)=3=1.3=3.1=-1.-3=-3.-1

\(\Rightarrow\left[{}\begin{matrix}x+1=1;y+1=3\\x+1=3;y+1=1\\x+1=-1;y+1=-3\\x+1=-3;y+1=-1\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0;y=2\\x=2;y=0\\x=-2;y=-4\\x=-4;y=-2\end{matrix}\right.\)

Vậy:.................

xy+14+2y+7x= -10

\(\Leftrightarrow\)y(x+2)+7(x+2)=-10

\(\Leftrightarrow\)(y+7)(x+2)=-10=1.(-10)=2.(-5)=5.(-2)=10.(-1)

giup mik voi

$3x-10=14$

$3x=14+10$

$3x=24$

$x=24:3$

$x=8$

3x-(-17)=14

3x=14+(-17)

3x=-3

x=(-3):3

x=-1

Vậy x=-1.

|x+9|.2=10

|x+9|=10:2

|x+9|=5

\(\Rightarrow\orbr{\begin{cases}x+9=-5\\x+9=5\end{cases}\Rightarrow\orbr{\begin{cases}x=-14\\x=-4\end{cases}}}\)

Vậy \(x\in\left\{-14;-4\right\}\)

\(3x-\left(-17\right)=14\)

\(3x+17=14\)

\(3x=14-17\)

\(3x=-3\)

\(x=-1\)

\(a,\left|x+9\right|.2=10\)

\(\left|x+9\right|=5\)

\(th1:x+9=5\)

\(x=-4\)

\(Th2:x+9=-5\)

\(x=-14\)

Vậy.....

hok tốt!!

Trả lời

568-{5.[143-3.(14-1)]+10}:10

=568-{5.[143-3.13]+10}:10

=568-{5.[143-39]+10}:10

=568-{5.104+10}:10

=568-530:10

=568-53

=515

568-{5x[143-3x13+10}:10

=568-{5x[143-39+10}:10

=568-(5x114):10

=568-570:10

=568-57

=511

a,-13+x=39            b,3x+17=14              

x=52                    x=-1

hok tốt

a) \(-13+x=39\)

\(\Leftrightarrow x=52\)

Vậy x=52

b) \(3x-\left(-17\right)=14\)

\(\Leftrightarrow3x+17=14\)

\(\Leftrightarrow3x=-3\)

\(\Leftrightarrow x=-1\)

\(c)|x+9|\cdot2=10\)

\(\Leftrightarrow|x+9|=5\)

\(\Leftrightarrow\orbr{\begin{cases}x+9=5\\x+9=-5\end{cases}\Leftrightarrow\orbr{\begin{cases}x=4\\x=-14\end{cases}}}\)

a)

   \(\frac{2}{3}+\frac{1}{3}:x=\frac{3}{5}\)

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

    \(\frac{1}{3}:x=\frac{-1}{15}\)

     \(x=\frac{1}{3}:\frac{-1}{15}\)

    \(x=-5\)

b)

     \(\frac{10}{3x}+\frac{67}{4}=-13.25\)

      \(\frac{10}{3x}+\frac{67}{4}=\frac{-53}{4}\)

       \(\frac{10}{3x}=\frac{-53}{4}+\frac{67}{4}\)

       \(\frac{10}{3x}=\frac{7}{2}\)

      \(\Rightarrow10.2=7.3x\)

            \(20=21x\)

            \(x=\frac{20}{21}\)

c)

        x+30%x=-1.3

        x+0.3x=-1.3

        x (1+0.3) = -1.3

        x . 1.3 = -1.3

        x = -1.3 : 1.3

        x = 1

d)

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

           \(\frac{14}{5x}-50=51.\frac{2}{3}\)

             \(\frac{14}{5x}-50=34\)

             \(\frac{14}{5x}=34+50\)

              \(\frac{14}{5x}=84\)

               \(84.5x=14\)

              420x = 14

                   \(x=\frac{1}{30}\)

a, \(\frac{2}{3}+\frac{1}{3}:x=\frac{3}{5}\)

=> \(\frac{1}{3}:x=\frac{3}{5}-\frac{2}{3}\)

=>\(\frac{1}{3}:x=\frac{-1}{15}\)

=> \(x=\frac{1}{3}:\frac{-1}{15}\)

=> \(x=\frac{-1}{5}\)

a) 3x - 10 = 2x + 13

<=> 3x - 2x = 13+10

<=> x = 23

      Vậy x = 23

b) x + 12 = -5 - x

<=> x + x = -5 - 12

<=> 2x = -17

<=> x = -17 : 2

<=> x = -8,5

      Vậy x = -8,5

c) x + 5 = 10 - x

<=> x + x = 10 - 5

<=> 2x = 5

<=> x = 5 : 2

<=> x = 2,5

      Vậy x = 2,5

d) 6x + 2 ^ 3 = 2x - 12

<=> 6x + 8 = 2x - 12

<=> 6x - 2x = -12 - 8

<=> 4x = -20

<=> x = -20 : 4

<=> x = -5

     Vậy x = -5

e) 12 - x = x + 1

<=> -x - x = 1 - 12

<=> -2x = -11

<=> x = -11 : (-2)

<=> x = 5,5

     Vậy x= 5,5

f) 14 - 4x = 3x + 20

<=> -4x - 3x = 20 - 14

<=> -7x = 6

<=> x = 6 : (-7)

<=> x = \(-\frac{6}{7}\)