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MATH / If x, y, and z are real numbers for which …xyz?

Problem

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problem

If xx, yy, and zz are real numbers for which \begin{align*} x+y-z &= -8, \\ x-y+z &= 18,\text{ and} \\ -x+y+z &= 30, \\ \end{align*} then what is xyzxyz?
Plain-text mathematical notation (without MathML)
If x, y, and z are real numbers for which  \begin{align*}
x+y-z &= -8, \\
x-y+z &= 18,\text{ and} \\
-x+y+z &= 30, \\
\end{align*} then what is xyz?
Original LaTeX notation
If $x$, $y$, and $z$ are real numbers for which  \begin{align*}
x+y-z &= -8, \\
x-y+z &= 18,\text{ and} \\
-x+y+z &= 30, \\
\end{align*} then what is $xyz$?

level

Level 3

type

Algebra

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