Answer
$= -17$
Work Step by Step
1. We first substitute the $x, y, and \space z$ values into the equation using parenthesis:
$x - y - z$ for $x = -15$, $ y = 12$, $z = -10$
$= (-15) - (12) - (-10)$
2. 2. A double negative such as "−(−10)" will cancel out to become "10", a positive number.
$= - 15 - 12 + 10$
$= -27 + 10$
$= -17$
