Answer
$-1.5\leq j$
Work Step by Step
$6\leq12+4j$ $\longrightarrow$ subtract 12 from both sides
$6-12\leq12+4j-12$ $\longrightarrow$ simplify
$-6\leq4j$ $\longrightarrow$ divide both sides by 4
$-6\div4\leq4j\div4$ $\longrightarrow$ simplify
$-1.5\leq j$
Check the endpoint.
$6=12+4(-1.5)$
$6=12-6$
$6=6\checkmark$
Check the inequality.
$6\lt12+4(0)$
$6\lt12+4(0)$
$6\lt12\checkmark$