1, 2006 x 2005 - 1/2004 x 2006 + 2005 = 4411,202002

2,18 x (19191919/21212121 + 88888/99999) = 3,91015873

k mk nha pạn

mk nhanh nhất

x=36.5+2.18+15.7

x=54.38

x-15,7-2,18=36,5

=>x-(15,7+2,18)=36,5

=>x-17,88=36,5

=>x=36,5-17,88

=>x=18,62

Vậy x=18,62

x - 15,7 - 2,18 = 36,5

x - 15,7 = 36,5 + 2,18

x - 15,7 = 38,68

x = 38,68 + 15,7

x = 54,38

Do 0,15 < 1 < 2 < 2,18 nên x = 1 hoặc x = 2

1

\(\left[\left(X-\dfrac{1}{2}\right)\div6+4\right]\times\dfrac{2}{3}=\dfrac{3}{5}\times\dfrac{40}{6}\)

\(\left[\left(X-\dfrac{1}{2}\right)\div6+4\right]\times\dfrac{2}{3}=4\)

\(\left[\left(X-\dfrac{1}{2}\right)\div6+4\right]=4\times\dfrac{3}{2}\)

\(\left(X-\dfrac{1}{2}\right)\div6+4=6\)

\(\left(X-\dfrac{1}{2}\right)\div6=6-4\)

\(\left(X-\dfrac{1}{2}\right)\div6=2\)

\(\left(X-\dfrac{1}{2}\right)=2\times6\)

\(X-\dfrac{1}{2}=12\)

\(X=\dfrac{24}{2}+\dfrac{1}{2}\)

\(X=\dfrac{23}{2}\)

[(\(x-\dfrac{1}{2}\)):6 + 4]  \(\times\) \(\dfrac{2}{3}\) = \(\dfrac{3}{5}\) \(\times\) \(\dfrac{40}{6}\)

[(\(x\) - \(\dfrac{1}{2}\)):6 + 4] \(\times\) \(\dfrac{2}{3}\) = 4

(\(x-\dfrac{1}{2}\)): 6 + 4 = 4 : \(\dfrac{2}{3}\)

(\(x\) - \(\dfrac{1}{2}\)) : 6 + 4 = 6

(\(x\) - \(\dfrac{1}{2}\)) : 6       =  6 - 4

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

\(x-\dfrac{1}{2}\)            =  2 \(\times\) 6

\(x-\dfrac{1}{2}\)            = 12

\(x\)                    = 12 + \(\dfrac{1}{2}\)

\(x\)                    = \(\dfrac{25}{2}\)

Em cần trợ giúp gì vậy em. cô không thấy đề bài em ạ

bài 1 :

x + 678 = 2813

         x  =  2813 - 678

         x  = 2135

4529 + x = 7685

            x = 7685 - 4529

            x = 3156

x - 358 = 4768

        x  = 4768 + 358

        x  =  5126

2495 - x = 698

           x = 2495 - 698 

           x = 1797

x × 23 = 3082

        x = 3082 : 23 

        x = 134

36 × x = 27612

      x =  27612 : 36 

      x = 767

x : 42 = 938

       x =  938 x 42 

       x = 39396

4080 : x = 24

           x = 4080 : 24 

           x =170

bài 2 :

a. x + 6734 = 3478 + 5782

    x + 6734 = 9260

             x    =  9260 - 6734

             x    =  2526

b. 2054 + x = 4725 - 279

    2054 + x  = 4446

                x  =  4446 - 2054

                x  = 2392

c. x - 3254 = 237 x 145

    x - 3254 = 34365

             x   =  34365 + 3254

             x   =   37619

d. 124 - x = 44658 : 54

    124 - x = 827

             x = 827 - 124 

             x = 703

Bài 3: 

a. x × 24 = 3027 + 2589

    X x 24 = 5616

            x  = 5616 : 24 

            x  = 234

b. 42 × x = 24024 - 8274

    42 x X = 15750

            X = 15750 : 42 

            X = 375

c. x : 54 = 246 ×185

    X : 54 = 45510

          X  = 45510 x 54 

          X  = 2457540

d. 134260 : x = 13230 : 54

    134260 : x = 245

                   x = 134260 : 245

                   x  = 548

đúng tick chị nhé em!!! cảm ơn em nà :3

a: =>10+3x-3=6x+10

=>3x-3=6x

=>-3x=3

=>x=-1

b: =>x+1=0 hoặc x-2=0

=>x=-1 hoặc x=2

a) \(10+3\left(x-1\right)=10+6x\)

\(\Rightarrow10+3x-3=10+6x\)

\(\Rightarrow3x-6x=10-10+3\)

\(\Rightarrow-3x=3\)

\(\Rightarrow x=-\dfrac{3}{3}\)

\(\Rightarrow x=-1\)

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

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

\(\Rightarrow\left[{}\begin{matrix}x=-1\\x=2\end{matrix}\right.\)

\(a,\Leftrightarrow x^2-2x-x^2+1=0\\ \Leftrightarrow-2x+1=0\Leftrightarrow x=\dfrac{1}{2}\\ b,\Leftrightarrow\left(2x-1-x-4\right)\left(2x-1+x+4\right)=0\\ \Leftrightarrow\left(x-5\right)\left(3x+3\right)=0\\ \Leftrightarrow\left[{}\begin{matrix}x=5\\x=-1\end{matrix}\right.\)

a: Ta có: \(\left|x+1\right|+x=3\)

\(\Leftrightarrow\left|x+1\right|=3-x\)

\(\Leftrightarrow\left[{}\begin{matrix}x+1=3-x\left(x\ge-1\right)\\x+1=x-3\left(x< -1\right)\left(loại\right)\end{matrix}\right.\Leftrightarrow2x=2\)

\(\Leftrightarrow x=1\left(nhận\right)\)