Question

1/x-1 + 1/x

Answer 1

Find a common multiple between them two. What do you do when you don't have a common multiple? You multiply them together.

Answer 2

\[\frac{ 1 }{ a } + \frac{ 1 }{ b } = \frac{ b }{ ab } + \frac{ a }{ ab } = \frac{ b +a }{ ab }\]