Precalculus Examples

$f (5)$ if $f (x) = 3 x - 2$

Step 1

Replace the variable $x$ with $5$ in the expression.

$f (5) = 3 (5) - 2$

Step 2

Simplify $3 (5) - 2$ .

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Step 2.1

Remove parentheses.

$3 (5) - 2$

Step 2.2

Multiply $3$ by $5$ .

$15 - 2$

Step 2.3

Subtract $2$ from $15$ .

$13$