Algebra 1

The product of $2$ and the difference of $5$ and $n$
The difference of $5$ and $n$ represents $5-n$ "The product of" expresses that $2$ is being multiplied by that difference. Therefore, $2(5-n)$ can be written as "the product of $2$ and the difference of $5$ and $n$." If the question asks to solve for $n$, then the brackets may be expanded to make $10 - n = 0$, then by adding $n$ to both sides of the equation we get $n = 10$