Solve for: x+2 <= 3

Expression: $x+2 \leq 3$

Move the constant to the right-hand side and change its sign

$x \leq 3-2$

Subtract the numbers

$\begin{align*}&x \leq 1 \\&\begin{array} { l }x \in \left\langle-\infty, 1\right]\end{array}\end{align*}$