1. This equation can be solved using equational techniques.
这个方程可以使用等式技巧来解决。

2. Equational reasoning is an important tool in mathematics.
等式推理是数学中的一个重要工具。

3. The equational approach simplifies complex problems by representing them as sets of equations.
等式方法通过将复杂问题表示为一组方程来简化问题。

4. The student struggled with understanding equational logic in the math class.
这个学生在数学课上对等式逻辑的理解有困难。