Question

multiply both sides :multiply both sides by what?
$4.3(\quad) = (x+1.9)(\quad)$

Explanation:

Step1: Identify goal

We aim to isolate $x$, assuming this is from an equation like $\frac{4.3}{x+1.9}=1$ (the standard context for this step). To eliminate the denominator $(x+1.9)$, we multiply both sides by this term.

Step2: Apply multiplication rule

Multiply each side by $(x+1.9)$ to clear the denominator.
$4.3 \times (x+1.9) = (x+1.9) \times (x+1.9)$

Answer:

The missing term for both boxes is $\boldsymbol{x+1.9}$