X + 8 = 22

X = 22 − 8

X = 14

X + 14 = 92

X = 92 − 14

X = 78

23 + x = 62

X = 62 − 23

X = 39

c) (25 - 6x) . 3 - 5 = 7

(25 - 6x) . 3=7+5

(25 - 6x) . 3=12

25 - 6x=12/3

25 - 6x=4

6x=25-4

6x=21

x=21/6

x=3,5

a) (3x - 23) . 14 = 98

(3x - 23)=98/14

3x-23=7

3x=7+23

3x=30

x=30/3

x=10

b) (4x + 5) : 3 = 7

(4x + 5)=7.3

4x +5 =21

4x=21-5

4x=16

x=16/4

x=4

       25-{14-[(2-x)-(x+13)+23]}=62-{8-[(2x-10)-(29-3x)+8]}

<=>25-14+2-x-x-13+23=62-8+2x-10-29+3x+8

<=>13-x-x-13+23=2x+3x+8-10-29

<=>-x-x+23=2x+3x+(-31)

<=>23-(x+x)=2x+2x-31

<=>23-2x=2x+3x-31

<=>23+31=2x+2x+3x

<=>54=x(2+2+3)

<=>54=x.7

=>x=54/7

Vậy x=54/7

<=>54=x.7

- 62 + x = ( - 14 ) + 46 - x   

    x + x = ( - 14 ) + 46 + 62

        2x = 94

          x = 47

\(-62+x=\left(-14\right)+46-x\\ \Rightarrow x-62=32-x\\ \Rightarrow x-62-32+x=0\\ \Rightarrow2x-94=0\\ \Rightarrow2x=94\\ \Rightarrow x=47\\ b,5^{x+2}-5^x=10^2.6\\ \Rightarrow25.5^x-5^x=100.6\\ \Rightarrow24.5^x=600\\ \Rightarrow5^x=25\\ \Rightarrow5^x=5^2\\ \Rightarrow x=2\)

- 62 + x = ( - 14 ) + 46 - x   

    x + x = ( - 14 ) + 46 + 62

        2x = 94

          x = 47

bonus cho hỏi tại sao ở ngoài tên bn 1 đằng bên trang  cn lại 1 tên khác v chỉ mik với

B2:tìm x biết

1)x+18=6-2x

<=> 3x=-12

<=> x= -4

 2)17-x=7-6x

<=>5x=-10

<=>x=-2            

3)x+15=20-4x  

<=>5x=5

<=>x=1

4)7x-4=20+3x                

<=> 4x=24

<=>x=6

5)-12+x=5x-20    

<=>4x=8

<=>x=2

6)4x-18=x+27

<=>3x=45

<=>x=9

7) 2.(x-5)-3.(x+7)=14

<=>2x-10-3x-21=14

<=>-x=14+10+21=45

<=>x=-45

8)5.(x-6)-2.(x+3)=12

<=>5x-30-2x-6=12

<=>3x=48

<=>x=12

9)-7.(5-x)-2.(x-10)=15

<=>-35+7x-2x+20=15

<=>5x=30

<=>x=6

10)3. ( x - 4 ) - ( 8 - x )=12

<=>3x-12-8+x=12

<=>4x=32

<=>x=8

11)4.(x-5)-(x+7)=-19

<=>4x-20-x-7=-19

<=>3x=8

<=>x=8/3

 12)7.(x-3)-5.(3-x)=11x-5

<=>7x-21-15+5x=11x-5

<=>x=31

b1:bỏ ngoặc rồi tinh hợp lí

1) -( -66)+34+(-73)-27+99=66+34-73-27+99 =100-100+99=99

2)54-(45-30+54)-30+5=54-45+30-54-30+5=-45+5=-40     

3)42-56+33-(33-56+42)=42-56+33-33+56-42=0

4)50-(47+50-18)+(47-18)=50-47-50+18+47-18=0      

5) |25-24-10|-(28-30+4)=9-28+30-4=39-32=7

6)-(-73)+(44-94+27)+94=73+44-94+27+94=100+44=144

7) (-33+180-75)-(180+25)=-33+180-75-180-25=-100-33=-133

8)120-(-92+120-18)-92=120+92-120+18=108

b1:bỏ ngoặc rồi tinh hợp lí 

1) -( -66)+34+(-73)-27+99=66+34-73-27+99 =100-100+99=99 

2)54-(45-30+54)-30+5=54-45+30-54-30+5=-45+5=-40 

3)42-56+33-(33-56+42)=42-56+33-33+56-42=0

4)50-(47+50-18)+(47-18)=50-47-50+18+47-18=0 

5) |25-24-10|-(28-30+4)=9-28+30-4=39-32=7 

6)-(-73)+(44-94+27)+94=73+44-94+27+94=100+44=144 

7) (-33+180-75)-(180+25)=-33+180-75-180-25=-100-33=-133 

8)120-(-92+120-18)-92=120+92-120+18=108

x + 1/5 = 26/25 - 17/25                                                                         x       = 9/25 - 1/5                                                                           x       =      4/5                                                                                                                                                                                                                                                                                                                           

a) = 117 x 100 - 17 x 100

= ( 117 - 17 ) x 100

= 100 x 100

= 10000

b) ( 532 x 7 - 266 x 14 ) x ( 532 x 7 + 266 )

=  532 x 7 - 266 x ( 2 x 7 ) x 3990

= 532 x 7 - 266 x 2 x 7 x 3990

= (532 x 7 - 532 x 7) x 3990

= 0 x 3990

= 0

c) 506 x 5 + 1012 + 253 x 6

= 506 x 5 + (506 x 2) + 253 x ( 2 x 3 )

= 506 x 5 + 506 x 2 + 253 x 2 x 3

= 506 x 5 + 506 x 2 + 506 x 3

= 506 x ( 5 + 2 + 3 )

= 506 x 10

= 5060

đúng rồi cho thôi

a ) 117 x ( 36 + 62 ) - 17 x ( 62 + 36 )

   = ( 117 - 17 ) x 98

   = 100 x 98

   = 9800

a) 4(x+1)-(3x+1)=14

<=>4x+4-3x-1=14

<=>4x-3x = 14-4

<=>x=10

b) -12(x-5) +7.(3x)=5

<=> -12x +60 + 21+7x=5

<=> -12x+7x=5-60-21

<=> -5x=-76

<=> x=76/5

c) 17x + 34 -4x+28-9x=82

<=> 17x-9x-4x=82-34-28

<=> 4x=20

<=> x=5

cần trình bày cách làm không bạn?

a) x=11

b) x=-55/5

c) x= 5