Answer
$\color{blue}{7+4x}$
Work Step by Step
The expression "times" means the operation involved is multiplication.
Thus, if we let the number be $x$, "four times a number" means $4(x)$ or $4x$.
The expression "the sum of" means the operation involved is addition.
Therefore, "The sum of 7 and four times a number" means:
$\color{blue}{7+4x}$
