Question

giai pt : x/x+5=2  

Answer 1

x/(x+5)=2

<=>x=2.(x+5)

<=>x=2x+10

<=>2x-x=10

<=>x=10

Vậy x=10

Answer 2

<=>x/x+5 -2=0 <=> x/x+5 -2(x+5)/x+5 =0 <=>x-2x-10=0

<=.-x=10 =>x=-10