数学老师给了我们三个不同的解题方法。

The math teacher gave us three different ___solutions to the problem.

这种蓝色溶液是把染料溶解在水中制成的。

This blue ___solution is made by dissolving dye in water.

经过多次讨论，我们找到了解决这个问题的完美方案。

After several discussions, we found the perfect ___solution to this problem.