Fractions with variables obey the same rules as fractions with numbers.

### Simplifying

Algebraic fractions can be simplified, like number fractions, by dividing or cancelling.

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### Adding and subtracting

If the denominators are the same, add or subtract the numerators.

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If the denominators are different, a common denominator must be found.

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### Multiplying

When multiplying fractions, cancel first, if possible, then multiply top line and then bottom lines.

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### Dividing

When dividing fractions, turn the second fraction upside down and change to multiplying.

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