2 câu trả lời
Nếu `x ≤-4`
`=> 3(-x-4)-(-2x-1)-5(-x-3)+9-x=5`
`<=> x=-8/3`
Nếu `-4 ≤x ≤-3`
`<=> 3(x+4)-(-2x-1)-5(-x-3)+9-x=5`
`<=>x =-32/9`
Nếu `-3 ≤x ≤-1/2`
`<=> 3(x+4)-(-2x-1)-5(x+3)+9-x=5`
`<=>x=2`
Nếu `-1/2 ≤x ≤9`
`<=> 3(x+4)-(2x+1)-5(x+3)+9-x=5`
`=> x=0`
Nếu` x ≥9
`<=> 3(x+4)-(2x+1)-5(x+3)+x-9=5`
`<=>-6`
Đáp án:
Nếu x ≤-4
=> 3(-x-4)-(-2x-1)-5(-x-3)+9-x=5
<=> x=-8/3
Nếu -4 ≤x ≤-3
<=> 3(x+4)-(-2x-1)-5(-x-3)+9-x=5
<=>x =-32/9
Nếu -3 ≤x ≤-1/2
<=> 3(x+4)-(-2x-1)-5(x+3)+9-x=5
<=>x=2
Nếu -1/2 ≤x ≤9
<=> 3(x+4)-(2x+1)-5(x+3)+9-x=5
<=> x=0
Nếu x ≥9
<=> 3(x+4)-(2x+1)-5(x+3)+x-9=5
<=>-6
