Question

evaluate the expression for $f = -1$.
$67 + 79f = \underline{\quad\quad}$

Explanation:

Step1: Substitute $f=-1$ into expression

$67 + 79(-1)$

Step2: Calculate the product term

$67 - 79$

Step3: Compute the final subtraction

$67 - 79 = -12$

Answer:

$-12$