Precalculus Examples

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

Step 1

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

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

Step 2

Simplify $(5) + 7$ .

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Step 2.1

Remove parentheses.

$(5) + 7$

Step 2.2

Add $5$ and $7$ .

$12$