To simplify the expression \( \frac{3}{7}x + \frac{2}{7}x \), you can combine the like terms.
Both terms have the same coefficient of \( \frac{1}{7} \) and the common variable \( x \).
So you can add the coefficients:
\[ \frac{3}{7} + \frac{2}{7} = \frac{3 + 2}{7} = \frac{5}{7} \]
Thus, the combined expression is:
\[ \frac{5}{7}x \]
Therefore, the simplified expression is:
5/7x (Start Fraction 5 over 7 End Fraction x).