You can put this solution on YOUR website! The domain of a rational function is when the denominator can't be 0:
so if we set the denominator equal to 0, we can see which values do not work:
(subtract 10 on both sides) (divide -7 on both sides)
so the domain can be anything but 10/7 because that is when the denominator is 0.
In interval notation: (-inf,10/7)U(10/7,inf)