Tim x biet :b)3/x+4/-/2x+1/-5/x+3/+/x-9/=5

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