#### Answer

$112-x$

#### Work Step by Step

You are told that the sum of two numbers (which we will call $x$ and $y$) is 112.
Therefore, $x+y=112$.
To isolate $y$ and determine its value in terms of $x$, you need to subtract $x$ from both sides.
($x+y$)$-x=112-x$
Therefore, $y=112-x$.