Add 7 to isolate variable: Isolate the variable term by adding 7 to both sides of the inequality.−1a−7+7≤−6+7−1a≤1
Divide by −1 to solve: Divide both sides by −1 to solve for a. Remember that dividing by a negative number reverses the inequality sign.−1a/−1≥1/−1a≥−1