To maintain the ratio of eggs to sausages of 3:2, we can set up a proportion. If Edgar uses 12 eggs, we can represent the number of sausages he needs as follows:
Let \( s \) be the number of sausages.
The ratio can be set up as:
\[ \frac{3}{2} = \frac{12}{s} \]
To find \( s \), we can cross-multiply:
\[ 3s = 2 \times 12 \] \[ 3s = 24 \]
Now, divide both sides by 3:
\[ s = \frac{24}{3} = 8 \]
Therefore, Edgar needs 8 sausages.