Calculate: /(8) x+3+/(3) x+3

Expression: $$\frac { 8 } { x + 3 } + \frac { 3 } { x + 3 }$$

Since $\frac{8}{x+3}$ and $\frac{3}{x+3}$ have the same denominator, add them by adding their numerators. Add $8$ and $3$ to get $11$.

$$\frac{11}{x+3}$$