To find the number of cupcakes \( c \) that Grayson decorates, we can set up an equation based on the information given in the problem.
Grayson puts 5 sugar flowers on each cupcake, and in total, he uses 30 sugar flowers. Therefore, we can express this as:
\[ 5c = 30 \]
Where:
- \( 5 \) is the number of sugar flowers per cupcake,
- \( c \) is the number of cupcakes,
- \( 30 \) is the total number of sugar flowers used.
So the equation to find the number of cupcakes \( c \) is:
\[ 5c = 30 \]