Question

Solve this literal equation for y. (in comments)

Answer 1

\[\frac{ 1 }{ x }+ \frac{ 1 }{ y }=1\]

Answer 2

switch the (1/x) to the other side

Answer 3

\[\frac{1}{y} = 1-\frac{1}{x}\]
\[\frac{1}{y} = \frac{x}{x}-\frac{1}{x}\]
\[\frac{1}{y} = \frac{x-1}{x}\]
\[y = \frac{x}{x-1}\]