To solve the equation \(5.6(n + 1.42) = 7.8\), the first step would be to divide both sides by \(5.6\) to isolate the term with \(n\). This gives you:
\[ n + 1.42 = \frac{7.8}{5.6} \]
The second step would be to subtract \(1.42\) from both sides to solve for \(n\).
So the correct answer is:
Subtract 1.42 from both sides.