13) (3 x)/(5 x+5 y)-(x)/(10 x-10 y)

1. **Factor out common terms:** 2. **Find a common denominator:** The common denominator is .3. **Rewrite fractions with the common denominator:** 4. **Combine the numerators:** 5. **Expand and simplify the numerator:** 6. **Factor out x from the numerator (optional, depending on desired form):**