`sqrt{36x-72} -15sqrt{(x-2)/25} = 2(5+sqrt{x-2})`  `Đk : x >=2`

`sqrt{36(x-2)} -15. sqrt{x-2}/5 = 10 +2sqrt{x-2}`

`6sqrt{x-2} -3sqrt{x-2} =10 +2sqrt{x-2}`

`3sqrt{x-2} = 10+2sqrt{x-2}`

`3sqrt{x-2} -2sqrt{x-2} =10`

`sqrt{x-2} =10`

`x-2=100`

`x=102 ( tmđk)`

Vậy `....`