Mathematics

You're combining fractions inside the brackets first, then multiplying by $1/3$. The key is to find a common denominator for $-3/2$ and $7/5$ so you can add them as a single fraction—then the multiplication becomes straightforward. Think of it as simplifying what's in the brackets into one clean fraction before scaling it down by a third.

You're combining fractions inside the brackets first, then multiplying by $1/3$. The key is to find a common denominator for $-3/2$ and $7/5$ so you can add them as a single fraction—then the multiplication becomes straightforward. Think of it as simplifying what's in the brackets into one clean fraction before scaling it down by a third.