23 . (42 - x) = 23

          42 - x = 23 : 23

          42 - x = 1

                 x = 42 - 1

                 x = 41

23*(42-x)=23

42-x       =23:23

42-x       =1

    x       =42-1

   x        =41

23*(42-x)=23

(42-x)=23:23

(42-x)=1

x=42-1

x=41

\(23.\left(42-x\right)=23\)

<=>  \(42-x=1\)

<=>  \(x=41\)

Vậy...

hk tốt

^^

23.(42 – x) = 23

42 – x = 23: 23

42 – x = 1

x = 42 – 1

x = 41

Vậy x = 41

b) 23 . (42 – x) = 23

Vì 23 . 1 = 23

Nên 42 – x = 1

x = 42 -1

x = 41

Vậy x = 41

23.(42-x)=23

42-x      =23:23

42-x      = 1

x           = 42-1

x           = 41

23 : (42 - x) = 46

=> 42 - x = 1/2

=> x = 83/2

23 : (42 - x) = 46

         42 - x = 23 : 46

         42 - x = 0,5

                x = 42 - 0,5

                x = 41,5

23: (42 -x ) =46

       42 - x  = 23 :46

      42 - x  = 0.5

           x   = 42 --0.5

           x = 41.5

vậy x= 41.5

∗ TH1:  x + 6 = 112 x = 112 − 6 x = 106 ∗ TH2:  x + 6 = − 112 x = − 112 − 6 x = − 118 Vậy   x   =   - 118   hoặc   x   =   106

(x-45).27 = 0

=> x - 45 = 0

=> x = 45 + 0

=> x = 45

23.(42 - x) = 23

=> 42 - x = 23 : 23

=> 42 - x = 1

=> x = 42 - 1

=> x = 41

l--i-k-e cho mk

a/ => x - 45 = 0 => x = 45

b/ => 42 - x = 1 => x = 41

a: =>x:6,5=57,7

hay x=373,75

b: =>x:2,4=45.4

hay x=108,96

\(x:6,5=\dfrac{577}{10}\Leftrightarrow x=\dfrac{7201}{20}\)

\(x:2,4=45,4\Leftrightarrow x=\dfrac{2724}{25}\)

X: 6,5-34,7=23

X: 6,5= 23+34,7

X: 6,5= 23+34,7

X:6,5= 57,7

X= 57,7x6,5

X= 375,05

X: 2,4=42+3,4

x:2,4+=45,4

x= 45,4x2,4

x= 108,96