To solve the equation \(2(x + 3) - 4 = 0\), follow these steps:

1. Distribute the 2 through the parentheses:
\[
2(x + 3) - 4 = 0 \implies 2x + 6 - 4 = 0
\]

2. Combine like terms:
\[
2x + 2 = 0
\]

3. Isolate the variable \(x\) by subtracting 2 from both sides:
\[
2x = -2
\]

4. Divide both sides by 2:
\[
x = -1
\]

So, the solution to the equation \(2(x + 3) - 4 = 0\) is \(x = -1\).