Question

Evaluate the expression for the given value of the variable. $$7 \text {x when} \quad x=3$$

Short answer

The value of the expression when \(x=3\) is 21

Step-by-step solution

Identification of the Expression and Variable

Firstly, identify the given expression and variable. The given expression in this exercise is \(7x\) and the variable \(x\) is given the value 3.

Substitute Variable Value into the Expression

Now, substitute the given value of the variable \(x\) into the expression. This will result in the mathematical operation \(7 * 3\).

Evaluate the Result

After substitution, the last step is to simplify the equation. The multiplication \(7 * 3\) equals 21.