To simplify \( \frac{3}{7}x + \frac{2}{7}x \), we can combine the like terms.
Since both terms have a common factor of \( \frac{1}{7}x \), we can add the coefficients:
\[ \frac{3}{7}x + \frac{2}{7}x = \left( \frac{3 + 2}{7} \right)x = \frac{5}{7}x \]
So, the simplified expression is \( \frac{5}{7}x \).
The correct answer is:
5/7x (Start Fraction 5 over 7 End Fraction x).