Giúp mình với cảm ơn ạ

f. 7x-1/6 + 2x = 16-x/5

⇔5(7x-1)/6.5 + 30.2x/30 = 6.(16-x)/5.6

⇔35x-5/30 + 60x/30 = 96-6x/30

⇒(35x-5)+60x =96-6x

⇔35x-5+60x=96-6x

⇔35x+60x+6x=96+5

⇔101x=101

⇔x=1

g. 3x-5/x-3 = 2

⇔3x-5/x-3=2.(x-3)/x-3

⇒3x-5=2(x-3)

⇔3x-5=2x-6

⇔3x-2x=-6+5

⇔x=-1

h. x-3/x+3 - 2/x-3= 3x+1/x²-9

⇔(x-3)(x-3)/(x+3)(x-3) - 2(x+3)/(x+3)(x-3) = 3x+1/(x+3)(x-3)

⇒(x-3)²-2(x+3)=3x+1

⇔x²-2.x.3+9-2-6=3x+1

⇔x²-6x+1=3x+1

⇔x²-6x-3x=1-1

⇔x²-9x=0

⇔x(x-9)=0

⇔x=0 hoặc x-9=0

⇔x=0 hoặc x=9