\(\left(d\right)30-x=200-175\)

\(30-x=25\)

\(x=5\)

\(\left(e\right)5\left(x+12\right)=70\)

\(x+12=14\)

\(x=2\)

tương tự 2 câu trên bạn tự làm câu cuối nhé, mình không ghi lại đề đâu

#quankun^^

 d,175+(30-x)=200

    (30-x)       = 200 - 175

     30 - x      = 25

           x       = 30 - 25 

           x       = 5. 

e,5(x+12)+22=92

   5(x+12)      = 92 -  22

   5(x+12)      = 70

       x+12       = 70 : 5

         x + 12   = 14

         x           = 14 - 12

          x          = 2.

f,95-5(x+2)=45

       5(x+2) = 95 - 45

        5(x+2)= 50

         x + 2 = 50 : 5

         x + 2 = 10

          x      =10 -2

          x      = 8

Hok tốt !

\(d,175+\left(30-x\right)=200\Leftrightarrow175+30-x=200\Leftrightarrow x=5\)

\(e,5\left(x+12\right)+22=92\Leftrightarrow5x+60+22=92\)

\(\Leftrightarrow5x=10\Leftrightarrow x=2\)

\(f,95-5\left(x+2\right)=45\Leftrightarrow95-5x-10=45\Leftrightarrow5x=40\)\(\Leftrightarrow x=8\)

#Học tốt

a) \(70-\left(x-3\right)=45\)

\(x-3=70-45\)

\(x-3=25\)

\(x=25+3\)

\(x=28\)

b) \(12+\left(5+x\right)=20\)

\(5+x=20-12\)

\(5+x=8\)

\(x=8-5\)

\(x=3\)

c) \(130-\left(100+x\right)=25\)

\(100+x=130-25\)

\(100+x=105\)

\(x=105-100\)

\(x=5\)

d) \(175+\left(30-x\right)=200\)

\(30-x=200-175\)

\(30-x=25\)

\(x=30-25\)

\(x=5\)

e) \(\left(x+12\right)+22=92\)

\(x+12=92-22\)

\(x+12=70\)

\(x=70-12\)

\(x=58\)

f) \(95-\left(x+2\right)=45\)

\(x+2=95-45\)

\(x+2=50\)

\(x=50-2\)

\(x=48\)

a)

70 - (x - 3) = 45

x - 3 = 70 - 45 = 25

x = 25 + 3 = 28

Vậy x = 28

b)

12 + (5 + x) = 20

5 + x = 20 - 12 = 8

x = 8 - 5 = 3

Vậy x = 3

c)

130 - (100 + x) = 25

100 + x = 130 - 25 = 115

x = 115 - 100 = 15

Vậy x = 15

d)

175 + (30 - x) = 200

30 - x = 200 - 175 = 25

x = 30 - 25 = 5

Vậy x = 5

e)

(x + 12) + 22 = 92

x + 12 = 92 - 22 = 70

x = 70 - 12 = 58

Vậy x = 58

f)

95 - (x + 2) = 45

x + 2 = 95 - 45 = 50

x = 50 - 2 = 48

Vậy x = 48

câu c sai r kìa bạn

a) \(70-5\left(x-3\right)=45\)

\(5\left(x-3\right)=25\)

\(x-3=5\)

\(\Rightarrow x=8\)

b) \(12+\left(5+x\right)=20\)

\(5+x=8\)

\(\Rightarrow x=3\)

c) \(130-\left(100+x\right)=25\)

\(100+x=105\)

\(\Rightarrow x=5\)

d) \(175+\left(30-x\right)=200\)

\(30-x=25\)

\(\Rightarrow x=5\)

e) \(5\left(x+12\right)+22=92\)

\(5\left(x+12\right)=70\)

\(x+12=14\)

\(\Rightarrow x=2\)

a. 70 - 5.(x - 3) = 45

5.(x - 3)             = 70 - 45

x - 3                  = 25 : 5

x                       = 5 + 3

x                       = 8

b. 12 + (5 + x) = 20

5 + x               = 20 - 12

x                     = 8 - 5

x                     = 3

c. 130 - (100 + x) = 25

100 + x                = 130 - 25

x                          = 105 - 100

x                         = 5

d. 175 + (30 - x) = 200

30 - x                 = 200 - 175

x                        = 30 - 25

x                        = 5

e. 5.(x + 12) + 22 = 92

5.(x + 12)             = 92 - 22

x + 12                  = 70 : 5

x                          = 14 - 12

x                          = 2

admin là con chó

a, x + 350 : x = 93 - 45 : 2 

=> x + 350 : x = 93 - 22,5

=> x + 350 : x = 70,5

=> ? 

5 km 175 m = 5,175km

9 dm2 45 cm2 = 9,45dm2

3 m3 23 dm3 = 3,023m3

6 tấn 3 kg = 6,003tấn 

Nhớ k nha!^_^

5 km 175 m = 5,175 km

9 dm2 45 cm2 = 9,45 dm2

3 m3 23 dm3 = 3,023 m3

6 tấn 3 kg = 6,003 tấn

Tk mk nha

5km 175m=5,175km

9dm2 45cm2=9,45dm2

3m3 23dm3=3,023m3

6 tấn 3 kg=6,003 tấn.

Tích nha

1) 70 - 5( x - 3 ) = 45

5( x - 3 ) = 70 - 45

5( x - 3 ) = 25

x - 3 = 25 : 5

x - 3 = 5

x = 5 + 3

x = 8

2) 12 + ( 5 + x ) = 20

5 + x = 20 - 12

5 + x = 8

x = 8 - 5

x = 3

3) 130 - ( 100 + x ) = 25

100 + x = 130 - 25

100 + x = 105

x = 105 - 100

x = 5

4) 175 + ( 30 - x ) = 200

30 - x = 200 - 175

30 - x = 25

x = 30 - 25

x = 5

5) 5( x + 12 ) + 22 = 92

5( x + 12 ) = 92 - 22

5( x + 12 ) = 70

x + 12 = 70 : 5

x + 12 = 14

x = 14 - 12

x = 2

6) 95 - 5( x + 2 ) = 45

5( x + 2 ) = 95 - 45

5( x + 2 ) = 50

x + 2 = 50 : 5

x + 2 = 10

x = 10 - 2

x = 8

7) 14x + 54 = 82

14x = 82 - 54

14x = 28

x = 28 : 14

x = 2

8) 15x - 133 = 17

15x = 17 + 133

15x = 150

x = 150 : 15

x = 10

9) 155 - 10( x + 1 ) = 55

10( x + 1 ) = 155 - 55

10( x + 1 ) = 100

x + 1 = 100 : 10

x + 1 = 10

x = 10 - 1

x = 9

a) 3636:(12x-91) =36

12x-91 = 3636:36

12x-91=101

12x=101+91

12x=192

x=192:12

x=16

b) (x : 23+45).67=8911

(x : 23+45)=8911:67

(x : 23+45)=133

x:23=133-45

x:23=88

x=88.23

x=2024

c) 420+65.4 =(x+175):5+30

420+260=(x+175):5+30

680=(x+175):5+30

(x+175):5=680-30

(x+175):5=650

(x+175)=650x5

(x+175)=3250

x=3250-175

x=3075

d) (32.15):2=(x+70):14-10

480:2=(x+70):14-10

240=(x+70):14-10

(x+70):14=240+10

(x+70):14=250

(x+70)=250.14

(x+70)=3500

x=3500-70

x=3430

e)x-4867=(175.2-50.70):25+23

x-4867=(350-3500):25+23

x-4867=-3150:25+23

x-4867=-126+23

x-4867=-103

x=-103+4867

x=4764