You can put this solution on YOUR website! What is the domain of ((2x-6)/(15-5x))
(2x-6)/(15-5x)
When the denominator=0, the expression becomes undefined.
So, set the denominator=0 and solve for x.
15-5x=0
5(3-x)=0
3-x=0
x≠3
Domain: all real numbers except x=3
(-∞,3) U (3,∞)