AHAHAHA. Reminds me of when I used my college physics course when working one-hour photo. We actually had to work with film and do adjustments then, and color was the most routine adjustment. There were two sets of colors: Red, Blue, Green, and Yellow, Cyan, Magenta. I remember that Red, Blue, and Green were primary colors, and Yellow, Cyan, and Magenta were each the absence of one of those colors. So when the pictures were coming out yellow, I thought, "Hey, we should be adding blue!" And it worked! My co-workers were very impressed.

Good job on the muffins! I am all for algebra solving baking problems!