9-(27-2x)=-|-27|-15

9-(27-2x)=-42

27-2x = 51

2x = 27 - 51

2x = -24

x = -24 : 2

x = -12

15+2x=27

=>2x=27-15

=>2x=12

=>x=12:2

=>x=6

15+2x=27

=> 2x = 27 - 15

=> 2x = 12
=> x = 12 : 2

=> x = 6
Vậy x = 6

\(2x+15=27\)

\(\Rightarrow2x=12\)

\(\Rightarrow x=6\)

2x+15=27

2x=27-15

2x=12

x=12/2

x=6

vậy x=6

x=2117

2x+15=27-4x, collect the terms 
2x+4x=27-15 
6x=12, divid through by 6 
6x/6=12/6 
x=2

ủng hộ nha!

2x + 15 = 27

   2x      = 27 - 15

   2x      = 12

    x       = 12 : 2 

    x       =  6

2x + 15 = 27

=> 2x = 27 - 15

=> 2x = 12

=> x = 12 : 2

=> x = 6

(x+2x+3x)-(8+15+27)=4x+68

     6x       -      50       =4x+68

     6x- 4x                   =68+50

         2x                      =118

            59    =x

\(x-8+2x-15+3x-27=4x+68\)

\(\Leftrightarrow6x-50=4x+68\)

\(\Leftrightarrow6x-4x=68+50\)

\(\Leftrightarrow2x=118\)

\(\Leftrightarrow x=59\)

\(2x-6=2\left(x-5\right)+25+27-15-17\)

\(\Leftrightarrow2x-6=3x-15+52-32\)

\(\Leftrightarrow2x=3x+37-32+6\)

\(\Leftrightarrow2x=3x+37-26\)

\(\Leftrightarrow2x=3x+11\text{( vô lí )}\)

\(\text{Vậy }x\in\varnothing\)

Mình không viết lại đề nhé!

a) 27 - x + 15 + x = x + 2

-x + x - x = 2 - 15 - 27

-x = -40

x = 40

b) 8x - 75 = 5x +21

8x - 5x = 21 + 75

3x = 96

x = 32

c) 15 - |2x - 1| = |-8|

15 - 2x + 1 = 8

-2x = 8 -1 -15

-2x = -8

x = 4 

d) 9x + 25 = -(2x - 58)

9x + 25 = -2x + 58

9x +2x = 58 - 25

7x = 33

x = 33/7

a, =>2x-10=x-17

=>2x-x=-17+10

=>x=-7

vậy x=-7

b,=>3-5x-7=-2x-2x-3

=>-5x-4=-4x-3

=>5x-4x=3-4

=>x=-1

c,2x-9-15+27=21-12+x

=>2x+1=9+x

=>2x-x=9-1

=>x=8

3x - 15 = 60

=> 3x = 60 + 15

=> 3x = 75

=> x = 75 : 3 = 25

42 - 2x = 30

=> 2x = 42 - 30 

=> 2x =   12

=> x = 12 : 2 =6

27 - 3x = 12

=> 3x = 27 - 12

=> 3x = 15

=> x = 15 : 3 = 5

30 - 2x = 10

=> 2x = 30 -10

=> 2x = 20

=> x = 20 : 2 = 10

3X= 60 - 15

3X = 45

X = 3 : 45

X = 15

42 - 2X = 30

-2X = 30 - 42

-2X = -12

X = 12 : 2

X = 6

27 - 3X = 12

- 3X = 12 - 27

-3X = -15

X = 5

30 - 2X = 10 

-2X = 10 - 30

-2X = -20

X = 10