方程式

1. Origins, structure, and basic meaning

• Structure: 方程式 is read as ほうていしき and means “equation”.
• Basic usage: The examples show an equation copied and solved and a new one formed from conditions.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • It is a mathematical equality containing unknowns to solve, distinct from a general expression that states no equality.