Factor. \[ 6 x+18 \]

Step 1 ：The given expression is a linear expression in one variable. To factorize it, we need to find the greatest common factor (GCF) of the coefficients of the terms. The GCF of 6 and 18 is 6. So, we can factorize the expression by taking out the GCF.

Step 2 ：The expression is \(6x + 18\).

Step 3 ：Factor out the GCF from the expression, which gives us \(6(x + 3)\).

Step 4 ：Final Answer: The factored form of the given expression is \(\boxed{6(x + 3)}\).