Answer
$-2\leq n$
Work Step by Step
$4-2n\leq5-n+1\longrightarrow$ combine like terms
$4-2n\leq6-n\longrightarrow$ add 2n to each side
$4-2n+2n\leq6-n+2n\longrightarrow$ add
$4\leq6+n\longrightarrow$ subtract 6 from each side
$4-6\leq6+n-6\longrightarrow$ subtract
$-2\leq n$
