Simple...
so you have...
\(\frac{4}{5} n- \frac{3}{5} = \frac{1}{5} n\)
You want to isolate the variable,n,....
so subtract....
\(\frac{4}{5} n- \frac{3}{5} = \frac{1}{5} n\)
\(- \frac{4}{5}n\) \(-\frac{4}{5} n\)
Leaving you with.....
\(-\frac{3}{5} = -\frac{3}{5} n\)
Now, divide....
\(\frac{- \frac{3}{5} }{ -\frac{3}{5} } = \frac{- \frac{3}{5}n }{ -\frac{3}{5} }\)
Making n=1
Thus, your answer.
