Splitting 100 dollars between two siblings

Jack and Jill share a $100 inheritance. If you subtract one-third of Jack's portion from one-quarter of Jill's portion, the result is $11. How much does Jack inherit?

$24. With Jack's share $n$, Jill gets $100-n$ and $\tfrac{100-n}{4}-\tfrac{n}{3}=11$. Multiplying by $12$: $300-3n-4n=132$, so $7n=168$ and $n=24$.