Answer:
The first step to solving the equation is:
Hence, 3x + 24 = 42 is the correct option.
Explanation:
Given the equation

First of all, we need to apply the distributive law on the left side of the equation to expand the equation.

So the equation would be expaneded using the distributive law on the left side of the equation

∵ a(b+c) = ab + ac
Therefore, the first step to solving the equation is:
Hence, 3x + 24 = 42 is the correct option.