Identify Values and Operation: Identify the values given in the problem and the operation required.We are given f=20 and need to evaluate the expression f−6.
Substitute Value into Expression: Substitute the value of f into the expression.Replace f with 20 in the expression, so it becomes 20−6.
Perform Subtraction Operation: Perform the subtraction operation.Calculate 20−6 to find the value of the expression.20−6=14