Question

mn giúp mình ạ

Answer 1

=>\(\dfrac{3\cdot3\left(x+5\right)}{12\left(x-5\right)\left(x+5\right)}-\dfrac{15}{2\left(x-5\right)\left(x+5\right)}=\dfrac{-14\left(x-5\right)}{12\left(x+5\right)\left(x-5\right)}\)

=>\(9\left(x+5\right)-90=-14x+70\)

=>9x-45=-14x+70

=>x=5(loại)