## Algebra 1

$7\lt x+6\leq12\longrightarrow$ subtract 6 from each part $7-6\lt x+6-6\leq12-6\longrightarrow$ subtract $1\lt x\leq6$ A parenthesis indicates that 1 is not included in the solution set, while a square bracket indicates that 6 is included in the solution set.