What is 81 / (9^2 - 72) - (5-3)?

Jul 3, 2018

$7$

Here's how I did it:

Explanation:

$\frac{81}{{9}^{2} - 72} - \left(5 - 3\right)$

$= \frac{81}{81 - 72} - 2$

$= \frac{81}{9} - 2$

$= 9 - 2$

$= 7$

Jul 3, 2018

$7$

Explanation:

The denominator simplifies to $81 - 72$, and we're now left with

$\frac{81}{9} - \left(5 - 3\right)$

This further simplifies to

$9 - \left(5 - 3\right)$

$9 - 2 = 7$

Hope this helps!