# How do inverse operations help solve equations?

##### 2 Answers

They are helpful for solving with respect to a variable: if after some step you find yourself in a situation such as

They allow us to "undo" what has been done to the variable.

**Example 1**

Solve:

After

Usually, we just do the inverse operation to the quantities that are equal.

The solution is

As you gain practice, you probably won't even write that much. You understand that you're subtracting

**Example 2** (much shorter)

Solve:

Here, we have multiplied the unknown by

The solution is