Evaluate
\frac{13}{99}+\frac{1}{x}
Factor
\frac{13x+99}{99x}
Graph
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\frac{99}{99x}+\frac{13x}{99x}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of x and 99 is 99x. Multiply \frac{1}{x} times \frac{99}{99}. Multiply \frac{13}{99} times \frac{x}{x}.
\frac{99+13x}{99x}
Since \frac{99}{99x} and \frac{13x}{99x} have the same denominator, add them by adding their numerators.
Examples
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Matrix
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Integration
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Limits
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