Verified Answer :

You want to do to one side the same thing you do to the other side.

In order to get the n by itself you divide the 25n by 25. But in order to not change the answer you need to do the same to the 70.

\(\frac{25n}{25} = \frac{70}{25}\)

so n=\(\frac{70}{25}\) which can be reduced to \(\frac{14}{5}\)

so n=\(\frac{14}{5}\)