Answer
$\frac{30n+17}{28}$
Work Step by Step
By inspection, we see that the LCM of the denominators is $28$. Therefore, we create a common denominator using this LCM and obtain:
$\frac{2n+3}{4}+\frac{4n-1}{7}$
=$\frac{7(2n+3)+4(4n-1)}{28}$
=$\frac{14n+21+16n-4}{28}$
=$\frac{14n+16n-4+21}{28}$
=$\frac{30n+17}{28}$
