a/ x+4/5-x+4=x/3-x-2/2 b/ (x+1).(x+2)=(2-x).(x+2)

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1. `x+4/5-x+4=x/3-x-2/2`

   `<=>x+4/5+4=x/3-1`

   `<=>2x=-87/5`

   `<=>x=-87/10`

   `(x+1)(x+2)=(2-x)(x+2)`

   `<=>x^2+2x+x+2=4-x^2`

   `<=>2x^2+3x-2=0`

   `<=>(x+2)(2x-1)=0`

   `<=>x=-2` hoặc `x=1/2`

    

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2. a, $x+\dfrac{4}{5}-x+4=\dfrac{x}{3}-x-\dfrac{2}{2}$

   $<=>x+\dfrac{24}{5}=\dfrac{x}{3}-1$

   $<=>\dfrac{2}{3}x=\dfrac{-29}{5}$

   $<=>x=\dfrac{-87}{10}$

   b, $<=>(x+2)(x+1-2+x)=0$

   $<=>(x+2)(2x-1)=0$

   $<=>x+2=0$ hoặc $2x-1=0$

   $<=>x=-2$ hoặc $x=\dfrac{1}{2}$

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