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

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1. 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

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