Question

Timf x

i) ( 12- 3x ) : 20 = 0

k) ( 2x - 86 ) : 9999 = 0

l) 83 : ( 5x + 28 ) = 1

m) 98 : ( 72 - x ) = 98

Làm đùm mình nha.

Answer 1

i)x=4

k)x=43

l)x=11

m)x=71

tk mk nha bạn

Answer 2

i) ( 12- 3x ) : 20 = 0

=> 12 - 3x = 0

3x = 12

x=12 : 3 =3

k) ( 2x - 86 ) : 9999 = 0

=> 2x - 86 = 0

=> 2x = 86

=> x = 86 : 2 = 43

l) 83 : ( 5x + 28 ) = 1

5x + 28 = 83 : 1 = 83

5x = 83 - 28

5x =55

x=55 : 5 = 11

m) 98 : ( 72 - x ) = 98

72-x = 98 : 98

72 - x = 1

x = 72 - 1 = 71

Answer 3

Cho mình sửa lại chút!

i) ( 12- 3x ) : 20 = 0

=> 12 - 3x = 0

3x = 12

x=12 : 3 =4

k) ( 2x - 86 ) : 9999 = 0

=> 2x - 86 = 0

=> 2x = 86

=> x = 86 : 2 = 43

l) 83 : ( 5x + 28 ) = 1

5x + 28 = 83 : 1 = 83

5x = 83 - 28

5x =55

x=55 : 5 = 11

m) 98 : ( 72 - x ) = 98

72-x = 98 : 98

72 - x = 1

x = 72 - 1 = 71

Answer 4

i) ( 12- 3x ) : 20 = 0

12 - 3x = 0

3x = 12

x= 4

k) ( 2x - 86 ) : 9999 = 0

2x - 86 = 0

2x = 86

x= 43

l) 83 : ( 5x + 28 ) = 1

5x + 28 = 83

5x = 55

x= 11

m) 98 : ( 72 - x ) = 98

72 -x = 1

x= 71

Answer 5

i) (12 -3x) : 20 =0

12-3x=0.20

12-3x=0

3x=12-0

3x=12

x=12:3

x=4

Vậy x=4

k)(2x-86):9999=0

2x-86=0.9999

2x-86=0

2x=0+86

2x=86

x=86:2

x=43

Vậy x=43

l)83:(5x+28)=1

5x+28=83:1

5x+28=83

5x=83-28

5x=55

x=55:5

x=11

Vậy x=11

m)98:(72-x)=98

72-x=98:98

72-x=1

x=72-1

x=71

Vậy x=71

Answer 6

i) (12-3x) : 20 = 0

=>12-3x=0

=>3x=12

=>x=4

l) 83:(5x+28)=1

=> 5x+28=83

=> 5x=83-28

=> 5x=55

=>x=11