Graphic design isn't something new. For years and years, people have been designing labels and packaging for their products. But what happened before programs like Photoshop came along to make things easier? Why did you even have to use algebra in graphic design to begin with?
Well, look at it this way: each logo and custom typeface had to be rough-drafted by hand, and the process of spacing, aligning, and centering text or images needed to be done by using a series of algebraic equations. For example, if you knew your label for a bottle was five inches long, and you had a logo that was two inches long, a set of text that needed to be four inches long, and you needed to include information on the side that was roughly two inches long, you would have to start with the measurements you knew and the measurements you need to know can be easily figured out through an algebraic equations.
It's a lot like your high school math class, except this time you have to write the problems out yourself! The downside to this method was obviously that projects would end up taking a very long time, and you had to possess both mathematical skill as well as artistic ability. And lets not forget about what would happen if your calculations were even just a bit off. You could easily be forced to scrap your entire project and start over again.
Image Credit: mandolux