# How do you solve m-13.5 =-16.5?

##### 1 Answer

#### Answer:

Isolate

#### Explanation:

We're looking for a value

This equation is like a balanced scale. Right now,

Here, we *choose* to **add 13.5 to both sides** so that the

The LHS simplifies to just

After adding

as our answer.

## Footnote:

By adding some value to both sides, we create an equation that contains the same information, but says it in a different way. If we choose what we add (or multiply, or whatever) carefully, the new equation can be more useful. For example here, what we're saying is that if

is true, then

is also true, and this is a much more useful form of the same information.