1. The problem is to simplify the expression $2x-4$. 2. The expression $2x-4$ is already simplified, but it can be factored by taking out the common factor of 2. 3. Factoring out 2, we get $$2x - 4 = 2(x - 2)$$. 4. Therefore, the simplified, factored form of $2x-4$ is $2(x-2)$.