## Elementary Algebra

$n\le42$
Multiplying both sides by the $LCD= 6$ and then using the properties of inequalities, the solution to the given inequality, $\dfrac{1}{2}n-\dfrac{2}{3}n\ge-7 ,$ is \begin{array}{l}\require{cancel} 3(1n)-2(2n)\ge6(-7) \\\\ 3n-4n\ge-42 \\\\ -n\ge-42 \\\\ n\le42 .\end{array}