Decide Whether the Equation Is an Identity, a Conditional Equation $$2 ( 3 x + 20 ) - 6 x - 40 = 0$$

Multiple Choice

Decide whether the equation is an identity, a conditional equation, or a contradiction. Give the solution set.
- $$2 ( 3 x + 20 ) - 6 x - 40 = 0$$

A) Conditional; $\{ 0 \}$
B) Contradiction; $\varnothing$
C) Conditional; $\{ 3 \}$
D) Identity; {all real numbers\}