You can obtain an explanation for any step by clicking on it. Please note that you cannot click on the very first expression, which is the original problem.

First, both sides are multiplied by (m + n) to get rid of the denominator:

Next, term 'tm' will be moved to the right side:

In the linear equation above, we need to isolate the variable 'm' on the left side.

Next, we divide both sides by (s - t) and obtain the solution for 'm':