Solve for X in the Equation: 6x + 3.4 = 15.4

To solve this problem, we'll follow these steps:

• Step 1: Subtract 3.4 from both sides of the equation.
• Step 2: Divide the resulting value by 6 to find $x$.

Let's execute each step:
Step 1: The original equation is $6x + 3.4 = 15.4$.
Subtract 3.4 from both sides:
$6x + 3.4 - 3.4 = 15.4 - 3.4$
This simplifies to:
$6x = 12$.

Step 2: Divide both sides by 6 to solve for $x$:
$x = \frac{12}{6}$.
This simplifies to:
$x = 2$.

Therefore, the solution to the problem is $x = 2$, which matches choice 3.