To model the problem, we can set up the following equation based on the information given:
Since Tanvi uses 7 pieces of licorice for each window, we can express the total pieces of licorice used for the windows as \( 7w \), where \( w \) represents the number of windows. We know that she used 56 pieces of licorice for the windows, so we can write the equation as:
\[ 7w = 56 \]
Now, we can solve for \( w \):
- Divide both sides of the equation by 7:
\[ w = \frac{56}{7} \]
- Perform the division:
\[ w = 8 \]
So, Tanvi has 8 windows on her gingerbread house this year.