Solve the Inequality for a a+1<=3

$a + 1 \leq 3$

Subtract $1$ from both sides of the inequality.

$a \leq 3 - 1$

Subtract $1$ from $3$ .

$a \leq 2$

The result can be shown in multiple forms.

Inequality Form:

$a \leq 2$

Interval Notation:

$(- \infty, 2]$