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OpenStudy (anonymous):
1/x-1 + 1/x
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OpenStudy (abb0t):
Find a common multiple between them two. What do you do when you don't have a common multiple? You multiply them together.
OpenStudy (abb0t):
\[\frac{ 1 }{ a } + \frac{ 1 }{ b } = \frac{ b }{ ab } + \frac{ a }{ ab } = \frac{ b +a }{ ab }\]
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