a) \(3\left(x-5\right)+6=36\)

\(\Rightarrow3\cdot\left(x-5\right)=36-6\)

\(\Rightarrow3\cdot\left(x-5\right)=30\)

\(\Rightarrow x-5=10\)

\(\Rightarrow x=10+5\)

\(\Rightarrow x=15\)

b) \(200-8\cdot\left(x+7\right)=24\)

\(\Rightarrow8\cdot\left(x+7\right)=200-24\)

\(\Rightarrow8\cdot\left(x+7\right)=176\)

\(\Rightarrow x+7=\dfrac{176}{8}\)

\(\Rightarrow x+7=22\)

\(\Rightarrow x=22-7\)

\(\Rightarrow x=15\)

c) \(\left(x-890\right)\left(74-x\right)=0\)

+) \(x-890=0\)

\(\Rightarrow x=890\)

+) \(74-x=0\)

\(\Rightarrow x=74\)

d) \(\left(31-x\right)\cdot\left(x-64\right)=0\)

+) \(31-x=0\)

\(\Rightarrow x=31\)

+) \(x-64=0\)

\(\Rightarrow x=64\)

A . 3636 : ( 12 x X - 91 ) = 36

                    ( 12 x X - 91 ) = 3636 : 36

                     ( 12 x X - 91 ) = 101 

                       12 x X = 101 + 91 

                    12 x X = 192 

                            X = 192 : 12

                         X = 16 

B . (X: 22+ 45) x67= 8911

      (X: 22+ 45)        = 8911 : 67 

      (X: 22+ 45)       =            133

      X: 22                 = 133 - 45 

      X: 22                 = 88

        X                     = 88 x 22 

       X                     = 1936

C  . (X +74) -318= 200

       X + 74           = 200 + 318 

       X + 74           = 518

      X                     =  518 - 74

      X                    =  444

D   . 5x X- 18 = 8+9 

       5x X - 18 = 17

       5x X         = 17 + 18 

       5x X        = 35 

            X        = 35 : 5 

             X       = 7

L . 1440: (125- X) =12

                 125 - X  = 1440 : 12 

                 125 - X  = 120 

                            X = 125 - 120 

                           X   =  5

K MÌNH NHA !!!

A. X=16 

B. X=1936

C. X=444

D. X=7

L. X=5

a, \(12\left(x-1\right)=0\Rightarrow x-1=0\Rightarrow x=1\)

b, \(\left(x-47\right)-115=0\Rightarrow x-47-115=0\)

\(\Rightarrow x=115+47=162\)

c, \(x-36:18=12\Rightarrow x-2=12\Rightarrow x=14\)

d, \(\left(x-36\right):18=12\Rightarrow x-36=216\Rightarrow x=252\)

Chúc bạn học tốt!!!

\(a.12\left(x-1\right)=0\)

\(x-1=0:12\)

\(x-1=0\)

\(x=0+1\)

\(x=1\)

\(b.\left(x-47\right)-115=0\)

\(x-47=0+115\)

\(x-47=115\)

\(x=115+47\)

\(x=162\)

\(c.x-36:18=12\)

\(x-36=12.18\)

\(x-36=216\)

\(x=216+36\)

\(x=252\)

\(d.\left(x-36\right):18=12\)

\(x-36=12.18\)

\(x-36=216\)

\(x=216+36\)

\(x=252\)

a) 12 . ( x - 1 ) = 0

x - 1 = 0 : 12

x - 1 = 0

x = 0 + 1

x = 1

b) ( x - 47 ) - 115 = 0

x - 47 = 0 + 115

x - 47 = 115

x = 115 + 47

x = 162

c) x - 36 : 18 = 12

x - ( 36 : 18) = 12

x - 2 = 12

x = 12 + 2

x = 14

d) (x - 36) : 18 = 12

x - 36 = 12 . 18

x - 36 = 216

x = 216 + 36

x = 252

a: =>25-4x=1

=>4x=24

hay x=6

b: =>2x-4=0

hay x=2

c: =>x-35=115

hay x=150

d: =>x-2=12

hay x=14

e: =>x-36=216

hay x=252

a) 0 : x = 0

           x = 0 : 0

           x = 0

b ) x - 36 : 18 = 12

     x - 2 = 12

     x = 12 + 2

     x = 14

c ) ( x - 36 ) : 18 = 12

       ( x - 36 ) = 12 x 18

        ( x - 36 ) = 216

         x - 36 = 216

           x = 216 - 36

           x = 180

b) x - 36 : 18 = 12

    x - 2         = 12

    x              = 12 + 2

    x              = 14

c) (x - 36) : 18 = 12

     x - 36        = 12 x 18

     x - 36        = 216

     x              = 216 + 36

     x              = 252

\(a,0:x=0\)

\(x=0x0\)

\(x=0\)

\(b,x-36:18=12\)

\(x-2=12\)

\(x=12+2\)

\(x=14\)

\(c,\left(x-36\right):18=12\)

\(x-36=12.18\)

\(x-36=216\)

\(x=216+36\)

\(x=252\)

\(\left(x-36\right):18=12\)

\(x-36=12.18\)

\(x-36=216\)

\(x=252\)

vậy \(x=252\)

\(5x-3=3x-11\)

\(5x-3x=-11+3\)

\(2x=-8\)

\(x=-4\)

vậy \(x=-4\)

\(3x+5x=16\)

\(8x=16\)

\(x=2\)

vậy \(x=2\)

\(2\left(x+1\right)=10\)

\(x+1=5\)

\(x=4\)

vậy \(x=4\)

k nha Pham Tuyet Nhung

1.=> x-36 = 216   = > x = 216 +36 =252

2. =>2x = -8 = > x= -4

3.8 x = 16  = > x = 2

4 . => x= 10 -1 = 9

ok có j ko hiểu hỏi riêng nha

( x - 36 ) : 18 = 12

x - 36 = 12 . 18

x - 36 = 216

x = 216 + 36

x = 252

5x - 3 = 3x - 11

5x - 3x = -11 + 3

2x = -8

x = -8 : 2

x = -4

3x + 5x = 16 

8x = 16

x = 16 : 8

x = 2

2 ( x + 1 ) = 10

x + 1 = 10: 2

x + 1 = 5

x = 5-1 

x = 4