748: x-31,72=13,6

748: x=13,6+31,72

748: x=45,32

x=748:45,32=16,50485............

ta có:

748 : X - 31,72 = 13,6

748 : X            = 13,6 + 31,72

748 : X            = 45,32

X                    = 748 : 45,32

X                    = bao nhiêu tự tính

tk cho mk nha

a ) 36 * x + 12 ,67 = 489,67

36 * x = 489,67 - 12,67 

36 * x = 477

x = 477 : 36 = 13,25

b ) x * 326,63 = 245,37

x = 245,37 : 326,63 = 0,7512169733....

c ) 29,5 * ( x + 10 ,25 ) = 376,125 

 x + 10 ,25 = 376,125 : 29,5

 x + 10 ,25 = 12,75

x = 12,75 - 10,25 = 2,5

d ) 748 : (x - 31,72) = 13,6 

x - 31,72 = 748 : 13,6

x - 31,72 = 55

x = 55 + 31,72 = 86,72

a, 36 * x + 12,67 = 489,67

    36 * x = 489,67 - 12,67 = 477

            x = 477 : 36 = 13,25

b, x * 326,63 = 245,37

    x = 245,37 : 326,63 = 0,75

c, 29,5 * (x + 10,25) = 376,125

    x + 10,25 = 376,125 : 29,5 = 12,75

    x = 12,75 - 10,25 = 2,5

d, 748 : ( x - 31,72 ) = 13 ,6

              ( x - 31,72 ) = 748 : 13,6 = 55

                x = 55 + 31,72 = 86,72

29,5 x ( x + 10,25 ) = 376,125 

=> x + 10,25 = 376,125 : 29,5

=> x + 10,25 = 12,75

=> x = 12,75 - 10,25

=> x = 2,5

748 : ( x - 31,72) = 13,6

=> x - 31,72 = 748 : 13,6

=> x - 31,72 = 55

=> x = 55 + 31,72

=> x = 86,72

\(29,5\left(x+10,25\right)=376,125\)

\(29,5x+302,375=376,125\)

\(29,5x=376,125-302,375\)

\(29,5x=y\)(y tự tìm)

\(x=\frac{y}{29,5}\)

a) \(36x+12,67=489,67\)

\(\Rightarrow36x=489,67-12,67\)

\(\Rightarrow36x=477\)

\(\Rightarrow x=477:36\)

\(\Rightarrow x=13,25\)

Vậy \(x=13,25\)

b) \(x.326,63=247,37\)

\(\Rightarrow x=247,37:326,63\)

\(\Rightarrow x=0,7573401096\)

Vậy \(x=0,7573401096\)

c) \(29,5\left(x+10,25\right)=376,125\)

\(\Rightarrow x+10,25=376,125:29,5\)

\(\Rightarrow x+10,25=12,75\)

\(\Rightarrow x=12,75-10,25\)

\(\Rightarrow x=2,5\)

Vậy \(x=2,5\)

d) \(748:\left(x+31,72\right)=13,6\)

\(\Rightarrow x+31,72=748:13,6\)

\(\Rightarrow x+31,72=55\)

\(\Rightarrow x=55-31,72\)

\(\Rightarrow x=23,28\)

Vậy \(x=23,28\)

\(x\cdot1,5-5,61=6,45\)

\(x\cdot1,5=12,06\)

\(x=8,04\)

\(89:x+51,5:x=62,5\)

\(\left(89+51,5\right):x=62,5\)

\(140,5:x=62,5\)

\(x=2,248\)

\(748:\left(x-31,72\right)=13,6\)

\(x-31,72=55\)

\(x=86,72\)

x * 25,6 = 128

x = 128 / 25,6 = 5

17,8 * x = 360,05 - 93,05

17,8 * x = 267

x = 267/17,8 = 15

29,5 * ( x + 10,25 ) = 376,125

x + 10,25 = 376,125/29,5

x + 10,25 = 12,75

x = 12,75 - 10,25 = 2,5

748 / ( x - 31,72 ) = 13,6

x - 31,72 = 748 - 13,6

x - 31,72 = 55

x = 55 + 31,72 = 86,72

a.(12,3-4,5):x=15

7,8:x=15

x=7,8:15=0,52

b.x-31,72=7,48:13,6

x-31,72=0,55

x=0,55+31,72=32,27

a.12,3:x-4,5:x=15

=>(12,3-4,5):x=15

=>7.8:x=15

=>x=7.8:15

=>x=0.52

b.7,48:9x-31,72)=13,6

=>x-31,72=7.48:13,6

=>x-31,72=0,55

=>x=0,55+31.72=32,27

Tìm x :

a, 12,3 : x - 4,5 : x = 15                                                                

   ( 12,3 - 4,5 ) : x   = 15

           7,8      : x    = 15

                         x     = 7,8 : 15

                         x      = 0,52

b, 7,48 : ( x - 32,72 ) = 13,6

                x  - 32,72   = 7,48 : 13,6

                x - 32,72    = 0,55

                x                 = 0,55 + 32,72

                x                 = 33,27

y-31,72=7,48:13,6

y-31,72=0,55

   y=0,55+31,72

  y=32,27

7,48:(y-31,72)=13,6

y-31,72=7,48:13,6

y-31,72=0,55

y          =0,55+31,72

y          =32,72

hay qua ban

\(\text{7,48:(y-31,72)=13,6 }\)

\(=>y-31,72=7,48:13,6\)

\(=>y=0,55+31,72=32,27\)

7,48 : ( y - 31,72 ) = 13,6

y - 31,72 = 7,48 : 13,6

y - 31,72 = 0,55

       y =  0,55 + 31,72

       y =  32,27

=> y - 31,72 = 7,48 : 13,6 = 0,55

=> y = 0,55 + 31,72 = 32,27

k mk nhna