Question

tim x: 69 - 3( x + 1 ) =42

Answer 1

69 - 3 x ( x + 1) = 42

3 x (x + 1) = 27

x + 1 = 9

x = 8

Answer 2

           69 - 3( x + 1 ) = 42 

                  3( x + 1 ) = 69 - 42

                  3( x + 1 ) = 27

                      x + 1   = 27 : 3

                      x + 1    = 9 

                      x         = 9 - 1 

                       x        = 8

Answer 3

\(69-3\left(x+1\right)=42\)

\(\Rightarrow3\left(x+1\right)=69-42\)

\(\Rightarrow3\left(x+1\right)=27\)

\(\Rightarrow x+1=27:3\)

\(\Rightarrow x+1=9\)

\(\Rightarrow x=9-1\)

\(\Rightarrow x=8\)

Vậy x = 8

_Chúc bạn học tốt_

Answer 4

69 - 3( x + 1 ) = 42

3( x + 1 ) = 69 - 42

3( x + 1 ) = 27

x + 1       = 27  : 3

x + 1       = 9

x             = 9  - 1

Vậy: x     = 8

Answer 5

69 - 3( x + 1 ) =42

3( x  - 1 ) = 69 - 42 

3( x - 1 ) = 27

x - 1 = 27 : 3

x- 1 = 9

x = 9-1

x = 8.

Học tốt nha ^^

Answer 6

69 - 3 ( x + 1 ) = 42

3 ( x + 1 ) = 69 - 42

3 ( x + 1 ) = 27

x + 1 = 27 : 3

x  + 1 = 9

x        = 9 - 1

x        = ........8........

Answer 7

69-3(x+1)=42

3(x+1)=69-42

3(x+1)=27

x+1=27:3

x+1=9

x=9-1

x=8