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

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

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

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

\(x=8,04\)

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

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

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

\(x=2,248\)

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

\(x-31,72=55\)

\(x=86,72\)

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

      x-31,72=748:13,6

       x-31,72=55

            x=55+31,72

            x=86,72

 vậy x=86,72 

k mk nha 

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

x-31,72=748:13,6

x-31,72=55

x=55+31,72

x=82,72

thank

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

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

\(\left(12,3-4,5\right):x=15\)

\(7,8:x=15\)

\(x=\dfrac{7,8}{15}=0,52\)

 12,3:x-4,5:x=15

 (12,3  -4,5):x=15

        7,8      :x=15

                    x=7,8:15

                    x=  0,52

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)

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

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

( 12,3 - 4,5 ) : x = 1,5

7,8 : x = 1,5

x = 7,8 : 1,5

x = 5,2

( 12.3 - 4.5 ) : x = 15

7.8 : x = 15

x = 7.8 : 15

x = 0.52

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

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

=> 7,8 : x = 15

=> x = 7,8 : 15 = 26/5