Question

giá trị của x thỏa mãn : 3(x-2)+2(x+1)=26

Answer 1

3(x-2)+2(x-1)=26

3x-6+2x-2=26

3x+2x-6-2=26

5x-8=26

5x=26+8

5x=34

x=34:5

x=6,8

Answer 2

Ta có:

3(  x - 2 ) + 2 ( x + 1 ) = 26

3 x - 6 +  2 x  +  2      = 26 

3x  +  2x                    = 26 + 6  - 2

  5x                          = 30

   x                           = 30 :5  

   x                           =  6

^^ Học tốt!  

Answer 3

\(3\left(x-2\right)+2\left(x+1\right)=26\)

\(\Leftrightarrow3\left(x-1\right)+2\left(x-1\right)=5\left(x-1\right)\)

\(\Leftrightarrow5\left(x-1\right)=2,13\)

\(\Leftrightarrow5x-5=26\)

\(\Leftrightarrow5x=31\)

\(\Leftrightarrow x=31\div5\)

\(\Rightarrow x=\frac{31}{5}\)

Answer 4

Sorry ý dưới mình làm nhầm 

\(3\left(x-2\right)+2\left(x+1\right)=26\)

\(3\left(x-2\right)+2\left(x-1\right)=5x-8\)

\(5x-8=26\)

\(5x=34\)

\(x=34\div5\)

\(x=\frac{34}{5}=6,8\)

Answer 5

\(3.\left(x-2\right)+2.\left(x+1\right)=26\)
=) \(3x-6+2x+2=26\)
=) \(3x+2x-6+2=26\)
=) \(5x-\left(6-2\right)=26\)
=) \(5x-4=26\)
=) \(5x=26+4=30\)
=) \(x=30:5=6\)