## Elementary Algebra

(a) The opposite of $x$ plus $y$. (b) $x$ minus $y$. (c) The opposite of $x$ minus $y$ plus $z$.
An algebraic expression like $-x - z$ can be put into words as "the opposite of $x$ minus $z$" since the opposite of $x$ is $-x$. By translating all of the given equations in this way, the answers can be found.