Question

giải pt

2(x-3) - (x+2) = 4(x+1)
 

Answer 1

<=> 2x - 6 - x - 2 = 4x + 4 
<=> 2x - 6 - x - 2 - 4x - 4 = 0
<=> - 3x - 12 = 0 
<=> - 3x        = 12
<=> x            = \(\dfrac{12}{-3}\)
<=> x               = -4
Vậy S = \(\left\{-4\right\}\)

Answer 2

=>4x+4=2x-6-x-2=x-8

=>3x=-12

hay x=-4

Answer 3

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

⇔2x-6-x-2=4x+4

⇔2x-x-4x=4+2+6

⇔-3x=12

⇔x=-4