equational logic

例句：

1. 1. The equational relationship between the twovariables is crucial for solving the problem.
   这两个变量之间的方程式关系对于解决问题至关重要。
2. 2. Thealgebraic expression of the equation canbe simplified using the distributive property.
   这个方程式的代数表达式可以通过分配律进行简化。
3. 3. In mathematics, equations are used to model real-world phenomena and relationships.
   在数学中，方程被用来模拟现实世界的现象和关系。