To solve the expression $*x = 2 \times x + 3$ given that $x = -5$, simply substitute $x = -5$ into the expression and calculate.

$*x* = 2 \times (-5) + 3$

Let's solve this step by step:

1. Multiply $2$ by $-5$: $2 \times (-5) = -10$

2. Add $3$ to $-10$: $-10 + 3 = -7$

So, $*x* = -7$ when $x = -5$.

Would you like more details or have any other questions?

Here are some related questions you might find interesting:

1. What is $*x*$ if $x = 2$?
2. How do you solve for $x$ if $*x = 7$?
3. What would the expression be if the coefficient of $x$ were different?
4. How does changing the constant term affect the result?
5. Can you graph the function $*x = 2x + 3$?

Tip: When evaluating an expression, always follow the order of operations: perform multiplication or division before addition or subtraction.