Equation is Conditional, an inconsistent or identity

Question

5(x+3) - (5x+15) = 0

Is this equation Conditional, Inconsistent or Identity?

Answer 1

5(x+3) - (5x+15) = 0

5x+15-5x-15=0

0=0

Since the variable dropped out AND it is a true statement, the answer is all real numbers, which means this equation is an identity.