Why was the algebra book always stressed?

This joke gets its chuckle from a clever bit of wordplay, a classic humor mechanism. The punchline hinges on the double meaning of "X's." In the context of an algebra book, "X's" are the unknown variables that students are constantly trying to solve for, which can certainly be a source of stress and frustration. But then, the wordplay shifts, and "X's" are heard as "exes," referring to past romantic partners, which many people find difficult to "get over" emotionally.

The humor is amplified by the relatable real-world context. For generations, algebra has been a notoriously challenging subject for many students, leading to plenty of head-scratching and, yes, stress. Simultaneously, the struggle to move on from previous relationships is a universal human experience, often accompanied by feelings of being stuck or overwhelmed. The joke brilliantly marries these two distinct sources of stress, creating a humorous connection between the abstract difficulties of mathematics and the very personal challenges of navigating one's love life.