a, 2x-8=0 b, x+2/4+x/2=1 c,2/3x+1=2 d,2x-4>0 e,2x+2<4x-1 Giúp mk với ạ❤

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1. `a)` `2x-8=0`

   `<=>2x=8`

   `<=>x=4`

   Vậy `x=4`

   `b)` `(x+2)/4+x/2=1`

   `=>x+2+2x=4`

   `<=>3x+2=4`

   `<=>3x=2`

   `<=>x=2/3`

   Vậy `x=2/3`

   `c)` `(2)/(3x+1)>0`

   Vì `2>0` `=>3x+1>0`

   `<=>3x>-1`

   `<=>x>-1/3`

   Vậy `x>-1/3`

   `d)` `2x-4>0`

   `<=>2x>4`

   `<=>x>2`

   Vậy `x>2`

   `e)` `2x+2<4x-1`

   `<=>2x-4x<-1-2`

   `<=>-2x<-3`

   `<=>x>3/2`

   Vậy `x>3/2`

   Trả lời

2. a, 2x-8=0

   ⇔ 2x= 8

     ⇔x = 8/2=4

   b, x+2/4+x/2=1

   ⇔ 4x/4+ 2/4+2x/4=4/4

   ⇔4      x + 2+2x= 4

   ⇔             6x=2 

   ⇔              x = 2/6

   d,2x-4>0

   ⇔  2x>4

   ⇔  x> 4/2 = 2

    e,2x+2<4x-1

   ⇔ 2x – 4x < -2-1

   ⇔ -2x < -3

   ⇔ x< 3/2

   c,2/3x+1=2

   ⇔ 3x=2-1

   ⇔ x = 1/3

   Trả lời