Question

3.9 - 5x = -16.1

Explanation:

Step1: Isolate the term with $x$

Subtract 3.9 from both sides:
$3.9 - 5x - 3.9 = -16.1 - 3.9$
$-5x = -20$

Step2: Solve for $x$

Divide both sides by -5:
$\frac{-5x}{-5} = \frac{-20}{-5}$

Answer:

$x = 4$