Precalculus Examples

$f (x) = 9 x + 5$ , $x = 7$

Step 1

Replace the variable $x$ with $7$ in the expression.

$f (7) = 9 (7) + 5$

Step 2

Simplify the result.

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Step 2.1

Multiply $9$ by $7$ .

$f (7) = 63 + 5$

Step 2.2

Add $63$ and $5$ .

$f (7) = 68$

Step 2.3

The final answer is $68$ .

$68$

Step 3