To find the cost, \( c \), of each bag of lemons, you can set up the equation as follows:
\[ 5c = 19.75 \]
To solve for \( c \), you would divide both sides by 5:
\[ c = \frac{19.75}{5} \]
Calculating that gives:
\[ c = 3.95 \]
So, each bag of lemons costs $3.95. The complete equation that models the cost of each bag of lemons is:
\[ 5c = 19.75 \]