3x-1/3x+2=4 solve for x

Question

Im confused on these questions.

Answer 1

Alex,

 

(3x -1) = 4(3x +2)

3x - 1 = 12x + 8

 

add 1 on each side of the equation: 3x -1 +1 = 12x +8 + 1

3x = 12x + 9

 

subtract 12x from each side of the equation: 3x - 12x = 12x - 12x + 9

-9x = 9

 

divide each side of the equation by -9: x = -1

 

I hope this helps.