Question

tìm x : I x + 3 I+ 10 - 5x = 0

Answer 1

`|x+3|+10-5x=0`

`<=>|x+3|=5x-10(x>=2)`

`+)x+3=5x-10`

`<=>4x=13`

`<=>x=13/4(tm)`

`+)x-3=10-5x`

`<=>6x=13`

`<=>x=13/6(tm)`

Vậy `S={13/4,13/6}`

Answer 2

TH1: `x+3>=0 <=> x>=-3`

`x+3+10-5x=0`

`-4x=-13`

`x=13/4` (TM)

TH2: `x+3<0 <=> x<-3`

`-x-3+10-5x=0`

`-6x=-7`

`x=7/6` (L)

Vậy `x=13/4`

 

Answer 3

Answer 4

*để \(\left|x+3\right|=x+3< =>x+3\ge0< =>x\ge-3\)

=>pt: x+3+10-5x=0=>x=3,25(TM)

*để \(\left|x+3\right|=-x-3< =>x+3< 0< =>x< -3\)

=>pt :  -x-3+10-5x=0<=>x=7/6(loại)

vậy x=3,25 ....